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Cape Canaveral, Florida — Feb 01, `08 — Space shuttle Atlantis’ STS-122 mission remains on schedule for launch Feb 07, `08 at 2:45 pm EST from NASA’s Kennedy Space Center in Florida now that a plan to fix a bent cooling system hose has been determined.

During launch preparations at Kennedy, technicians noticed a small section of a braided metal hose that was bent in a shape similar to the Greek letter Omega. The radiator retract hose, part of the shuttle’s cooling system that carries Freon, is designed to flex. However, engineers wanted to make sure they were not overlooking potential problems and designed a tool to guide the hose back into the storage box. Testing in Huntington Beach, Calif., has proven successful and program managers gave the go ahead to close payload bay doors using the tool on Sunday evening.

The NASA teams of controllers at Kennedy, Johnson Space Center in Houston and Marshall Space Flight Center in Huntsville, Ala., will be joined by European teams based in Germany for the mission. The German-based controllers will oversee the operation of the new Columbus laboratory which is tucked inside Atlantis’ payload bay.

The lab, built in Italy and outfitted in Germany, will be the second dedicated research facility taken to the International Space Station. It can hold 10 racks dedicated for experiments covering a wide range of space science.

Atlantis’ seven astronauts will arrive at Kennedy Monday at 10:30 am, and the countdown clock will begin ticking down Monday at 5 pm. More at NASA.

Cape Canaveral, Florida — The Space Shuttle Program met Thursday, Dec 27, to assess the progress made to troubleshoot an issue with the engine cutoff sensor circuit that occurred during the recent launch attempts and tanking test. Instrumentation installed for the tanking test indicate that there are one or more intermittent open circuits in the area of the feed through connector on the external tank’s liquid hydrogen tank.

The external parts of the connector will be removed and replaced with others that have been strategically soldered to ensure pin-to-socket connectivity and allow continuous electrical flow from sensors inside the external tank to the shuttle’s computers.

This work will take some time to properly accomplish and to certify the redesigned configuration before flight. While a launch on Jan 10 is no longer achievable, no launch date has been discussed. The program will take time to assess progress of the work before setting a target launch date. More at NASA.

Expedition 16 astronauts Dan Tani and Peggy Whitson wrapped up 100th spacewalk in support of station assembly and maintenance on Tuesday, Dec 18. The 6-hour, 56-minute spacewalk focused on International Space Station solar array issues.

The spacewalkers looked for the cause of partial loss of electrical power to one of the station’s two Beta Gimbal Assemblies (BGAs) for starboard solar wings. They also examined damage to the starboard Solar Alpha Rotary Joint (SARJ).

The SARJ enables the arrays to rotate in a paddlewheel-like fashion to follow the sun as the station orbits the Earth. The BGA lets the solar wings tilt along their long axis to point more directly to the sun.

After leaving the US airlock Quest and setting up equipment, Tani, EV1 or lead spacewalker, and Whitson moved to the station’s main truss and then out to near the end of its starboard side. There they inspected BGA 1A without seeing apparent damage. They disconnected two cables to facilitate ground tests.

On Dec. 8 the BGA’s primary power was lost after three circuit breakers tripped. A backup power source still functions, but because of the loss of redundancy, the device was latched with the wing in a position suitable for docking of the shuttle Atlantis on STS-122.

With the cables disconnected the circuits remained closed, apparently clearing the cables as suspects. Whitson reconnected them late in the spacewalk.

For the BGA inspection, the spacewalkers entered the truss from opposite sides, but remained together to be able to warn one another of obstructions in that confined area. That inspection took about 45 minutes.

Next the spacewalkers moved to the SARJ. Working together, they removed two large drive lock assembly covers and inspected the race rings and bearings beneath them. Then they removed and inspected beneath most of the 22 covers.

That SARJ was locked after vibrations were noted and increased power consumption was seen. Inspection findings Tuesday showed various degrees of contamination under the individual covers. Generally it was similar to what had been seen previously.

Tani and Whitson described what they saw, took photos and used tape and a scraper to collect samples of debris in the SARJ. That debris included metal shavings and “dusting” in the SARJ race ring

Finally, they removed trundle bearing assembly No. 5, one of the 12 trundle bearing assemblies that move along the race ring, and returned it to the station’s interior.

After cleanup they entered the Quest airlock and closed its hatch. The beginning of repressurization marked the official end of the spacewalk.

The starboard array continues to produce some power, and no station operations have been affected. But managers want to resolve the SARJ and BGA problems before launch of the Japanese Kibo laboratory next year.

The spacewalk was the 100th for the construction and maintenance of the station. During the spacewalk, Whitson set a new record for cumulative spacewalk time by a woman.

About halfway through today’s spacewalk she surpassed the mark set by Sunita Williams, a station crew member during Expeditions 14 and 15, who had a total of 29 hours and 17 minutes during four spacewalks. Whitson’s new mark is 32 hours, 36 minutes in five spacewalks.

More at NASA.

With the little help from NASA, now you can send your personalized Holiday Greetings 220 miles above the planet Earth.

Select a postcard and send your own personalized message to Expedition 16 crew members, Station Commander Peggy Whitson, and Flight Engineers Yuri Malenchenko and Daniel Tani the International Space Station.

Go ahead, make their day. Send your Greetings NOW.

Cape Canaveral, Florida — Dec 09, ‘07 — Space shuttle Atlantis’ STS-122 mission to the International Space Station is targeted to launch no earlier than Jan 02, ‘08 from NASA’s Kennedy Space Center. The liftoff date depends on the resolution of a problem in a fuel sensor system.

Early Sunday, one of the four engine cutoff, or ECO, sensors inside the liquid hydrogen section of Atlantis’ external fuel tank gave a false reading while the tank was being filled. NASA’s current Launch Commit Criteria require that all four sensors function properly.

The sensor system is one of several that protect the shuttle’s main engines by triggering their shut down if fuel runs unexpectedly low. Atlantis’ scheduled launch on Thursday, Dec 06, was delayed after two liquid hydrogen ECO sensors gave false readings.

The crew of STS-122 will be heading back to Houston on Sunday evening but before leaving they expressed their gratitude for the effort to launch.

The main objective of Atlantis’ 11-day mission is to install and activate the European Space Agency’s Columbus laboratory, which will provide scientists around the world the ability to conduct a variety of life, physical and materials science experiments. More at NASA.

Cape Canaveral, Florida — Dec 08, ‘07 — Space shuttle Atlantis is scheduled to launch Sunday, Dec 9, at 3:21 pm EST, from NASA’s Kennedy Space Center in Florida. Shuttle program managers made the liftoff decision after three days of reviewing data on a problem with fuel sensors.

Atlantis’ scheduled launch on Thursday was delayed after two of the four engine cutoff, or ECO, sensors in the shuttle’s external fuel tank gave false readings. A third sensor failed after the tank was drained of fuel. The sensor system is one of several that protect the shuttle’s three main engines by triggering their shut down if fuel runs unexpectedly low.

During a Mission Management Team meeting Saturday, NASA leaders decided to fuel the tank Sunday and monitor the status of the sensor system. If all four ECO sensors inside the liquid hydrogen section of the tank perform as expected, the countdown will proceed toward the planned liftoff. NASA Television coverage of the tank loading will start Sunday at 6 a.m., with launch coverage beginning at 10 a.m.

During Atlantis’ 11-day mission to the International Space Station, the astronauts will install and activate the European Space Agency’s Columbus laboratory, which will expand the station’s scientific research capabilities. Crew members for the STS-122 mission are Commander Steve Frick, Pilot Alan Poindexter, mission specialists Leland Melvin, Rex Walheim, Stanley Love and European Space Agency astronauts Hans Schlegel from Germany and Leopold Eyharts from France. More at NASA.

Cape Canaveral, Florida — Dec 07, ‘07 — NASA is targeting the launch of space shuttle Atlantis no earlier than Sunday, Dec 9, at 3:21 p.m. EST from the Kennedy Space Center, Fla. Shuttle program managers made the decision after a meeting Friday to review data on a problem with a fuel cutoff sensor system inside the shuttle and its external fuel tank.

Because of the length of the meeting, the managers agreed that targeting Sunday would allow the launch and management teams appropriate time to rest and prepare. The Mission Management Team will meet Saturday at 1 p.m. to decide whether to make a Sunday attempt. A news conference will be held after the meeting’s conclusion.

Atlantis’ scheduled launch Thursday was delayed after two ECO sensors gave false readings. A third sensor failed after the tank was drained of fuel. The fuel cutoff sensor system is one of several that protects the shuttle’s main engines by triggering their shut down if fuel runs unexpectedly low

During Atlantis’ 11-day mission to the International Space Station, the shuttle and station crews will work with ground teams to install and activate the European Space Agency’s Columbus laboratory. The new lab will expand the station’s scientific research capabilities. More at NASA.

Cape Canaveral, Florida  — Dec 07, ‘07 — The launch of NASA’s space shuttle Atlantis will take place no earlier than Saturday, Dec 8, at 3:43 p.m. EST. Thursday’s scheduled liftoff from NASA’s Kennedy Space Center, Fla., was postponed because of a problem with a fuel cutoff sensor system inside the shuttle’s external fuel tank.

The fuel cutoff sensor system is one of several that protect the shuttle’s main engines by triggering their shut down if fuel runs unexpectedly low. Launch Commit Criteria require that three of the four sensor systems function properly before liftoff.

Space Shuttle Program managers will hold a Mission Management Team meeting Friday at 3 p.m. to discuss the issue and determine the steps necessary to start a new launch countdown. A news conference will be held at about 6 p.m. after the meeting’s conclusion.

On Thursday morning, two of the four engine cutoff, or ECO, sensors inside the liquid hydrogen section of the tank failed a routine prelaunch check. Following the launch postponement, the tank’s liquid oxygen and liquid hydrogen were drained. While the tank was being emptied, engineers monitored and collected data on the liquid hydrogen sensors that failed. During that process, another sensor gave a false reading, indicating that the tank was “wet,” when it was dry. All ECO sensors are now indicating dry as they should be.

During Atlantis’ 11-day mission to the International Space Station, the shuttle and station crews will work with ground teams to install and activate the European Space Agency’s Columbus laboratory. The new lab will expand the station’s scientific research capabilities.

More at NASA.

Cape Canaveral, Florida — Dec 06, 07 — During tanking, two of four LH2 Engine Cutoff (ECO) sensors failed to respond appropriately, which is a Launch Commit Violation. The requirement to proceed calls for 3 of 4. The launch was scrubbed at 9:56 a.m. EST on the recommendation of Launch Director Doug Lyons.

Mission Management Team Chairman LeRoy Cain concurred following a short briefing on the issue. The ice inspection team will proceed with an abbreviated vehicle inspection prior to offloading the LO2 and LH2 and recycle for a launch attempt tomorrow, at 4:09 p.m.

A press briefing is tentatively scheduled for 4 p.m. EST.

The sensors are part of a safety system that ensures the shuttle’s main engine does not switch off too early or too late. At least three must be working perfectly before the shuttle can be cleared for launch. In flight, an onboard computer shuts the engines down when a majority of the sensors declare the main fuel tank to be empty.

Engineers are not only checking the sensors, but also surrounding circuitry for faults. Earlier this morning, engineers discovered a minor leak in equipment used to fill smaller liquid hydrogen tanks aboard the shuttle. The gas is used to power fuel cells that provide electricity during the voyage. More at NASA.

Cape Canaveral, Florida — Dec 05, ‘07 — The launch team at NASA’s Kennedy Space Center is continuing its steady march toward a lift off Thursday afternoon for space shuttle Atlantis. The countdown is proceeding smoothly, NASA Test Director Jeff Spaulding said Wednesday.

Technicians and engineers at the launch pad have several steps ahead of them Wednesday. The most visible milestone will come in the evening when the Rotating Service Structure is moved to its launch position where it will be out of the way of Atlantis. The gantry encloses much of the shuttle while it is on the launch pad and gives workers access to critical areas of the shuttle and its payload.

The weather forecast calls for a 90 percent chance of acceptable conditions at launch time.

“The vehicle’s looking good and the weather’s looking good, too,” Shuttle Weather Officer Kathy Winters said. More at NASA.

Houston — Dec 05, ‘07 — On August 07, 2008, after 20 years of hype, disappointment, blunders, triumphs and peerless glittering vistas of space and time, and four years after NASA decided to leave the Hubble Space Telescope to die in orbit, setting off public and Congressional outrage, a group of astronauts will ride to the telescope aboard the space shuttle Atlantis with wrenches in hand. Says NYTimes.

That, at least, is the plan.

Servicing Mission 4
NASA managers officially are targeting August 7, 2008, for the launch of the fifth and final space shuttle servicing mission to the Hubble Space Telescope. During the 11-day flight, Atlantis’ seven astronauts will repair and improve the observatory’s capabilities through 2013.

Mission planners have been working since last fall, when the flight was announced, to determine the best time in the shuttle manifest to support the needs of Hubble while minimizing the impact to International Space Station assembly. NASA also will support a “launch on need” flight during the Hubble mission. In the unlikely event a rescue flight becomes necessary, shuttle Endeavour currently is planned to lift off from Launch Pad 39-B at NASA’s Kennedy Space Center, Fla. However, managers constantly are evaluating the manifest to determine the best mission options.

Shuttle missions beyond the Hubble flight, designated STS-125, still are being assessed. Shuttle and station program officials will continue to consider options for the remainder of the shuttle flights to complete construction of the space station by 2010, when the fleet will be retired. Those target launch dates are subject to change.

More at NASA, NYTimes.

Cape Canaveral, Florida — Dec 03, ‘07 — Five NASA astronauts and two European Space Agency astronauts arrived at NASA’s Kennedy Space Center on Monday, for the start of countdown to Thursday’s space shuttle launch as NASA wrapped up repairs on Atlantis’ fuel tank.

Damage was discovered Friday to the insulating foam on the shuttle’s 15-story external tank. NASA doesn’t know how or when the gouges to the foam occurred, but the damage is considered minor.

New patches of foam have been applied. It will take 16 hours for the foam to harden properly, in plenty of time for liftoff late Thursday afternoon, said NASA test director Charlie Blackwell-Thompson.

Now that it’s repaired, the foam should pose no threat to Atlantis during launch, said Blackwell-Thompson. Falling foam was disastrous in the case of Columbia in 2003, and has been a recurring problem.

Space shuttle Atlantis is set to begin its launch countdown for the STS-122 mission with a flurry of activities at NASA’s Kennedy Space Center in Florida. Atlantis is scheduled to launch at 4:31 p.m. EST on Thursday, Dec 06. Packed safely aboard Atlantis was the European Space Agency’s Columbus Laboratory headed for delivery to the international space station.

NASA astronaut Steve Frick will command the seven-man crew during an 11-day mission to attach the European-built Columbus laboratory to the International Space Station. Frick, Alan Poindexter, Rex Walheim, Leland Melvin, Hans Schlegel and Leopold Eyharts will fly aboard Atlantis during mission STS-122.

“It’s been a long time building to this moment, so we’re just absolutely ready to go,” Frick said. “We flew by shuttle Atlantis on the launch pad and it’s a beautiful sight,” Poindexter said.

ESA’s Columbus laboratory is the most important European mission to the ISS to date and the cornerstone of Europe’s contribution to this international endeavour. Once Columbus is launched, assembled to the Space Station and verified, ESA will become an active partner in the operations and utilization of mankind’s only permanent outpost in space.

As the first European laboratory devoted to long-term research in space, Columbus will further expand the science capabilities of the ISS. In its interior, the Columbus laboratory will provide accommodation for experiments in the field of multidisciplinary research into biology, physiology, material science, fluid physics, technology, life science and education. In addition, its external payload facility hosts experiments and applications in the field of space science, Earth observation and technology.

More at NASA, ESA.

Nov 29, ‘07 — A developing star wrapped in a black cocoon of dust is seen sprouting giant jets in a new image from NASA’s Spitzer Space Telescope.

The stellar portrait, seen in infrared light, offers the first glimpse at a very early stage in the life of an embryonic sun-like star — a time when the star’s natal envelope is beginning to flatten and collapse, and streams of gas are escaping. The observations will ultimately help astronomers better understand how stars and their planets form.

“This is the first time we’ve clearly seen a flattened envelope around a forming star,” said Leslie Looney of the University of Illinois at Urbana-Champaign, lead author of a study about the star, called L1157, appearing Dec. 1 in Astrophysical Journal Letters. “Some theories had predicted that envelopes flatten as they collapse onto their stars and surrounding planet-forming disks, but we hadn’t seen any strong evidence of this until now.”

Stars are born out of thick clouds, or envelopes, of gas and dust that condense and collapse inward. As a star grows and feeds off the envelope, it spins faster and faster like a twirling ice skater. A disk of planet-forming material begins to take shape in orbit around the star, and jets of gas shoot up from above and below the disk to relieve the star’s accumulating pressure. Eventually, the original envelope falls onto the spinning disk, and the jets slow to a stop.

The regions where all the action takes place are dark and dusty, letting little visible light escape. For example, the embryonic star L1157 appears black in visible-light views. Spitzer’s infrared view of the star, on the other hand, penetrates the dusty haze, giving us a rare look at what our own solar system might have looked like when it was very young.

The bipolar jets shooting away from L1157 are enormous; light itself would take about nine months to travel the length of one jet. The color white shows the hottest parts of the jets, with temperatures around 100 degrees Celsius (212 degrees Fahrenheit). Most of the material in the jets, seen in orange, is roughly zero degrees on the Celsius and Fahrenheit scales.

The flattened envelope around the fledgling star is perpendicular to the jets and appears deep black. This is because it is so thick with dust that even infrared light cannot escape. The envelope is big enough to engulf the equivalent of tens of thousands of mature solar systems similar to our own, while the planet-forming disk tucked inside cannot be seen in this photo – it is smaller than a pixel.

L1157 is located about 800 light-years away in the constellation Cepheus. It is roughly 10,000 years old, and, according to astronomers’ estimates, will ignite to become a full-fledged star about the mass of our sun in a million years or so.

“Taking baby pictures of stars is not easy to do,” said Looney. “Now that we have a good picture, we can begin to ask questions about whether this star system and its potential planets will grow up to become like ours.”

Other authors of this study include John J. Tobin of the University of Michigan, Ann Arbor, and Woojin Kwan of the University of Illinois.

More at NASA.

Nov 29, ‘07 — Scientists analyzing data gathered by Cassini have confirmed the presence of heavy negative ions in the upper regions of Titan’s atmosphere. These particles may act as building blocks for more complicated organic molecules.

The discovery was completely unexpected because of the chemical composition of the atmosphere (which lacks oxygen - responsible for forming negative ions in the lower ionosphere of the Earth - and mainly consists of nitrogen and methane). The observation has now been verified on 16 different encounters.

Prof Andrew Coates, researcher at University College London’s Mullard Space Science Laboratory and lead author of the paper, says: “Cassini’s electron spectrometer has enabled us to detect negative ions which have 10 000 times the mass of hydrogen. Additional rings of carbon can build up on these ions, forming molecules called polycyclic aromatic hydrocarbons, which may act as a basis for the earliest forms of life.

Coates added, “Their existence poses questions about the processes involved in atmospheric chemistry and aerosol formation and we now think it most likely that these negative ions form in the upper atmosphere before moving closer to the surface, where they probably form the mist which shrouds the planet and which has hidden its secrets from us in the past. It was this mist which stopped the Voyager mission from examining Titan more closely in 1980 and was one of the reasons that Cassini was launched.”

The new paper builds on work published in Science on 11 May where the team found smaller tholins, up to 8000 times the mass of hydrogen, forming away from the surface of Titan.

Dr Hunter Waite of the South West Research Institute in Texas and author of the earlier study, said: “Tholins are very large, complex, organic molecules thought to include chemical precursors to life. Understanding how they form could provide valuable insight into the origin of life in the solar system.”

The findings, authored by A. Coates, F. Crary, G. Lewis, D. Young, J. Waite Jr. and E. Sittler Jr., published yesterday, 28 November, in the Geophysical Research Letters appear in ‘Discovery of heavy negative ions in Titan’s ionosphere’. More at ESA.

On Saturday, Nov 24, Astronauts spent seven hours in space to finish preparing the International Space Station for its next addition — Europe’s first permanent space laboratory, the Columbus laboratory — which is sitting in the cargo bay of space shuttle Atlantis at Cape Canaveral, Florida launch pad — set to lift off on December 6.

International Space Station Commander Peggy Whitson and Flight Engineer Daniel Tani completed a 7-hour, 4 minute spacewalk at 11:54 a.m. EST Saturday, continuing the external outfitting of the Harmony node in its new position in front of the US laboratory Destiny.

The spacewalkers completed all scheduled tasks, including another look at the starboard Solar Alpha Rotary Joint, and did some get-ahead work as well. The spacewalk otherwise was similar to the one on Nov. 20.

Tethered to the station, Whitson and Tani spent much of their time passing the second of two 300-pound (136-kg), 18.5-foot (5.6-metre) pallets “like a high-tech baton in a relay race” to its new position, a spokesman for the NASA said.

The pallet routes coolant lines to the station’s Harmony module to which the Columbus lab will be connected in December. Japan’s Kibo Experiments Module is set to be attached to Harmony in February.

Tani moved to the right side of the main truss and removed one of the 22 covers of the starboard Solar Alpha Rotary Joint (SARJ) and did an inspection similar to the one he did during his spacewalk during the STS-120 mission. He took digital pictures, samples of metallic shavings he found there. He described some surfaces as being abraded.

Tani did an inspection of a Solar Alpha Rotary Joint that had previously shown increased power consumption and vibration while rotating as it followed the Sun. Whitson deployed and mated cables to be used as part of the Station to Shuttle Power Transfer System, or SSPTS. A portable foot restraint was also installed on Node 2 for upcoming spacewalks when the European Columbus laboratory is installed on the STS-122 mission.

Saturday’s excursion 215 miles above Earth was the second spacewalk this week to connect Harmony to electrical, cooling and data systems aboard the station. Whitson and Tani relayed the first pallet into position on Tuesday.

Ground controllers told Whitson and Tani coolant was flowing into Harmony about an hour after they completed the connections.

“We couldn’t be more pleased to have a good install(ation) of Harmony,” Tani said. More at NASA.

During a new inspection Saturday, Tani and Whitson described what they said was clearly “metal on metal” grinding and took pictures to be sent back to NASA engineers on the ground for further study. They also left the joint uncovered to make it easy to look inside again. The joint must be fixed before a Japanese lab can be added to the station later next year.

NASA must now determine the cause of the damage and decide whether Atlantis’ lead spacewalker, Rex Walheim, will embark on another joint inspection spacewalk or attempt a repair next month. The fix could be a simple swap-out of a bearing mechanism or a major gear-replacement operation.

That decision to even attempt a fix will be largely dependent on how much power Atlantis uses on the flight to the station. Unlike the other two shuttles — Discovery and Endeavour — Atlantis cannot plug into the space station’s power system and must rely only on the power stored in its fuel cells, limiting its time in space. What to do about the joint is expected to be a matter of hot debate in the run-up to launch.

On Friday, Nov 23, ESA and London based Inmarsat Global Ltd announced  in Paris the formal signature of the contract for Alphasat satellite, one of the world’s largest telecommunications satellites.

The six-tonne satellite will deliver high-bandwidth services, such as mobile internet, to Europe, the Middle East, Asia and Africa.It will have five times the capacity of current space platforms.

Inmarsat will use Alphasat I-XL to support its huge I-4 satellites, which deliver the company’s global broadband network, BGan.

The spacecraft allow people to set up virtual offices anywhere around the world - on land or at sea. Users get half-a-megabit connections through small, laptop-sized terminals. Customers include business travellers, disaster relief workers, journalists, and people in the petrochemical and maritime industries.

The Alphabus Alphasat programme represents an expenditure of $649 million (€ 440 mln) by 16 ESA Member States. Under the development schedule, Alphasat will be available for launch in 2012.

Positioned at 25 degrees East, providing extended coverage to Africa, Europe, the Middle-East and parts of Asia , Alphasat will supplement the existing Inmarsat satellite constellation and offer the opportunity for new and advanced services.

Alphasat I-XL features a 12m aperture antenna reflector. It will have an electrical power of 12kW and a design lifetime of 15 years. The Alphabus model, though, allows for even bigger spacecraft to be made in the future, supporting missions that have a launch mass of more than eight tonnes and 18kW payload power.

One of the world’s most powerful rockets will be needed to launch a satellite of I-XL’s size - something comparable to a bus or small truck. As a flagship European mission, the task of lofting Alphasat I-XL may well fall to the European bloc’s premier launch vehicle, the Ariane 5 ECA. More at ESA.

Cape Canaveral, Florida — Nov 20, ‘07 –  A spacewalk scheduled for 6 hours and 40 minutes by International Space Station Commander Peggy Whitson and Flight Engineer Dan Tani to outfit the Harmony node in its new position in front of the US laboratory Destiny began at 5:10 a.m. EST Tuesday.

Whitson, the lead spacewalker, is wearing the suit with the red stripes while Tani is in the suit with the barber-pole stripes.

After leaving the Quest airlock and setting up tools and equipment, Whitson will remove, vent and stow an ammonia jumper, part of a temporary cooling loop. Removing it allows connection of the hookup of the permanent ammonia cooling loop on a fluid tray on the station’s exterior.

Tani meanwhile will retrieve a bag of tools left outside on the station during the Nov. 9 spacewalk by Whitson and Flight Engineer Yuri Malenchenko. Then he’ll remove two fluid caps to prepare for connection of that permanent cooling loop.

Next he will move on to reconfigure a circuit that was used for a Squib firing unit, a small pyrotechnical device that freed a radiator on the Port 1 truss for its deployment last Thursday.

Much of the spacewalk will be devoted to work with Harmony’s Loop A fluid tray. That 300-pound, 18.5-foot tray will be moved from its temporary position on the S0 truss, at the center of the station’s main truss, to Harmony, atop the starboard avionics tray.

Another spacewalk by Whitson and Tani to complete the exterior hookup of Harmony is scheduled for Nov. 24. More at NASA.

On Nov 14, astronauts on board the International Space Station have relocated the new Harmony node  to its final position on the forward facing port of the US Destiny laboratory, preparing the way for the arrival of the European Columbus laboratory.

The Italian-built Harmony module, also known as Node 2, was delivered to the International Space Station (ISS) during the recent STS-120 mission. During the mission’s first spacewalk, Harmony was installed in a temporary location on the port facing side of Unity.

Following the departure of STS-120 the Expedition 16 crew proceeded to relocate the Space Shuttle docking port, PMA2, from its location on the forward end of Destiny to the end of Harmony.

Expedition 16 Flight Engineer Dan Tani again operated the station’s robotic arm. Working slowly and deliberately, he moved the 31,500-pound Harmony with the 1.5 ton PMA-2 at its outboard end. Canadarm2’s base was attached to a power and data grapple fixture atop the Destiny laboratory.

Station Commander Peggy Whitson operated the common berthing mechanisms, first to free Harmony after Tani had grappled it with the arm, and later to drive bolts firmly securing it to the front of Destiny, the position PMA-2 had occupied for seven years.

After its Wednesday move, Harmony is in position to welcome visiting space shuttles. It also will offer docking ports to the European Space Agency’s Columbus laboratory, scheduled to arrive next month, and Japan’s Kibo experiment module, to become a part of the International Space Station next year.

Spacewalks by Whitson and Tani are scheduled Nov. 20 and Nov. 24 to complete the outfitting of Harmony.

Cape Canaveral, Florida — Nov 10, ‘07 – Two astronauts ventured out on a spacewalk at the international space station on Friday, smoothly picking up where the shuttle Discovery crew left off just days ago.

Commander Peggy Whitson and Flight Engineer Yuri Malenchenko completed their increment’s first spacewalk Friday at 10:49 a.m. EST. Their 6-hour, 55-minute spacewalk began just over an hour early at 3:54 a.m.

The two spent early Friday morning disconnecting and stowing cables, removing a light on one of the station’s transport carts and taking a cover off the Harmony node’s Common Berthing Mechanism, or CBM. On Monday, the Pressurized Mating Adapter 2 (PMA-2) will be moved from the Destiny lab and attached to Harmony’s CBM.

The spacewalkers also removed a base-band signal processor that will later be refurbished and a remote power controller module that will be replaced. They then transferred tools in preparation for upcoming spacewalks.

On Wednesday, Harmony with the newly attached PMA-2 will be moved to the forward end of the U.S. Destiny laboratory. Harmony was temporarily attached to the Unity node during space shuttle Discovery’s STS-120 mission.

Harmony, a pressurized chamber the size of a school bus, was delivered by Discovery late last month and installed in a temporary location. Harmony will serve as the docking port for European and Japanese laboratories.

Before NASA can launch its next shuttle mission, Harmony must be repositioned at the space station, a job that will require two more spacewalks and extensive robotic work over the next two weeks.

Space shuttle Atlantis rolled out to launch pad

NASA moved space shuttle Atlantis to its seaside launch pad 39A on Saturday ahead of a planned December 06 mission STS-122 to get Europe’s first permanent space laboratory into orbit.

Riding on top of a 3,000-ton Apollo-era mammoth crawler-transporter, Atlantis left the Kennedy Space Center’s massive assembly building at 4:43 a.m. EST. The 3.8-mile trip took approximately six hours and was hard down at 11:51 a.m.

The Columbus laboratory was waiting at the launch pad when Atlantis arrived and the module will soon be placed inside the shuttle’s cargo bay where it will undergo its own series of tests and preparations for launch.

Atlantis’ crew of seven includes two European Space Agency astronauts who will help install Columbus on the International Space Station and activate its intricate systems. One of the ESA crew members will remain on the station for a long-duration mission.

This launch milestone comes less than a week after space shuttle Discovery returned to NASA’s Kennedy Space Center in Florida to complete mission STS-120. That mission delivered the Harmony module to the station and will be the connecting point at the station for Columbus.

November 08, 2007 — ESA’s comet chaser, Rosetta, is on its way to its second close encounter with Earth on 13 November. The spacecraft’s operators are leaving no stones unturned to make sure Earth’s gravity gives it the exact boost it needs en route to its destination.
 
This month’s Earth swing-by is Rosetta’s third major step on its 10-year journey to 67/P Churyumov-Gerasimenko. The trajectory correction manoeuvre successfully performed last month prepared ESA’s Comet Chaser for the upcoming encounter. The spacecraft is now right on track to gain the right amount of energy from Earth’s gravity and save fuel later on.

Closest approach will take place on 13 November 2007 at 21:57 CET, at which time Rosetta will speed past at 45 000 km/h (about 12.5 km/s) relative to Earth. At this time, Rosetta will be 5301km above the Pacific Ocean, south-west of Chile, at 63° 46’ south and 74° 35’ west.

Why swing by Earth?
 
Swing-bys make use of the gravitational attraction of planets to modify a spacecraft’s trajectory and to gain the orbital energy needed to reach the final target. The first Earth swing-by took place on 4 March 2005. On 25 February 2007 Rosetta made its closest approach to Mars, to use its gravity.

The swing-by this month will be followed by the third and last swing-by, using Earth’s gravity, on 13 November 2009.While the gravity-assist manoeuvre at Mars was needed to slow the spacecraft down and head back towards the inner solar system, the second Earth swing by will help Rosetta gain enough energy to reach the outer Solar System through the asteroid belt and observe asteroid Steins, one of its scientific targets. Rosetta will then head back to Earth for the last planned swing-by in November 2009.

The increased energy from this Earth swing-by will help Rosetta cross the asteroid belt for a second time, observe Lutetia (its second target asteroid) and finally rendezvous with comet 67/P Churyumov-Gerasimenko. The rendezvous will take place about 4 astronomical units or 600 million km from the Sun, in 2014. Rosetta will be controlled from ESA’s Spacecraft Operations Centre (ESOC) in Darmstadt, Germany. More at ESA.

Two galaxies, containing a vast number of stars, swing past each other in a graceful dance choreographed by gravity, as seen by Hubble.
 

ESA News — Oct 30, ‘07 — The pair of galaxies collectively known as Arp 87 is among the hundreds of interacting and merging galaxies known in our nearby Universe. The Arp 87 pair was originally discovered and catalogued by astronomer Halton Arp in the 1970s. The ‘Arp’s Atlas of Peculiar Galaxies’ is a compilation of astronomical photographs using the Palomar 200-inch Hale and the 48-inch Samuel Oschin telescopes.

The two main players comprising Arp 87 are NGC 3808 and its companion NGC 3808A. NGC 3808 is a nearly face-on spiral galaxy with a bright ring of star formation and several prominent dust arms. Stars, gas, and dust flow from NGC 3808, forming an enveloping arm around its companion. NGC 3808A is a spiral galaxy seen edge-on and is surrounded by a rotating ring that contains stars and interstellar gas clouds. The ring is situated perpendicular to the plane of the host galaxy disk and is called a ‘polar ring.’ 

As seen in other mergers similar to Arp 87, the corkscrew shape of the tidal material (or bridge of shared matter) between the two galaxies suggests that some stars and gas drawn from the larger galaxy have been caught in the gravitational pull of the smaller one. The shapes of both galaxies have been distorted by their gravitational interaction with one another.Arp 87 is in the constellation Leo, the Lion, approximately 300 million light-years away from Earth. These observations were taken in February 2007 with the Wide Field Planetary Camera 2.  

Light from isolated blue, green, red, and infrared ranges was combined to form this color image.

Interacting galaxies often exhibit high rates of star formation. Many lines of evidence – colours of their starlight, intensity of emission lines from interstellar gas, far-infrared output from heated interstellar dust – support this fact. Some merging galaxies have the highest levels of star formation we can find anywhere in the nearby Universe. A major aspect of this excess star formation was properly revealed only when Hubble turned its imaging capabilities toward colliding galaxies. Among the observatory’s first discoveries was that galaxies with very active star formation contain large numbers of super star clusters – clusters more compact and richer in young stars than astronomers were accustomed to seeing in our galactic neighborhood 

Arp 87 is in the constellation Leo, the Lion, approximately 300 million light-years away from Earth. These observations were taken in February 2007 with the Wide Field Planetary Camera 2. Light from isolated blue, green, red, and infrared ranges was combined to form this colour image. More info & images at ESA.

GREENBELT, Md., Oct. 25, ‘07 /PRNewswire-USNewswire/ — NASA’s James Webb Space Telescope will use a new advanced technology network interface called “SpaceWire” that enables the components on the telescope to work more efficiently and more reliably with each other.

SpaceWire is a standard for high-speed communication links between satellite components. Originally developed by the European Space Agency, SpaceWire has been adopted and improved by a team at the NASA Goddard Space Flight Center in Greenbelt, Md. The James Webb Space Telescope (JWST) Integrated Science Instrument Module (ISIM) and Command and Data Handling (ICDH) engineering team has developed a small and very low power microchip that sends and receives SpaceWire signals at speeds of over 200 mega-bits per second.

The new higher bandwidth from SpaceWire enables the JWST ISIM to support the mission’s science instruments which employ 66 million detector pixels. This is the largest number of pixels ever used on a space telescope, and it will allow JWST to study more of the universe. Handling the large volume of data from these detectors presented a unique challenge for the JWST ICDH team. The development of this new network interface enables the JWST science instruments to realize their full scientific discovery potential, and will permit future NASA mission planners to consider use of more detectors with an even larger number of pixels to see even more of the universe.

SpaceWire is a standard for high-speed links and networks for use onboard a spacecraft, easing the interconnection of sensors, mass-memories and processing units. The SpaceWire standard provides many benefits. It helps facilitate the construction of high-performance onboard data handling systems, reduces system integration costs, increases compatibility between data handling equipment and subsystems, and encourages re-use of data handling equipment across several different missions.

To understand the benefit of SpaceWire, you can compare the speed of a dial-up modem to a high-speed broadband Internet connection. SpaceWire connects multiple spacecraft components on super-fast links to get a quicker result.

Goddard’s version of the SpaceWire technology has also dramatically accelerated the development of the JWST instrument electronics. The JWST ICDH team delivered the SpaceWire technology — which is packaged in a digital, low power (1.5W), high-speed (66Mbps) Field-Programmable Gate Array (FPGA) computer chip — to JWST partners including prime contractor Northrop Grumman, Lockheed, Jet Propulsion Laboratory (JPL), and the Canadian Space Agency.

The James Webb Space Telescope is a 21st century space observatory that will peer back more than 13 billion years in time to understand the formation of galaxies, stars and planets and the evolution of our own solar system. It is expected to launch in 2013. The telescope is a joint project of NASA, the European Space Agency and the Canadian Space Agency. The JWST