A Bit Of Brute Force Used In Hubble Repair

Finesse Fails To Free Bolt So Astronauts "Yank" Handrail During Successful Eight-Hour Spacewalk

(CBS/AP)  Spacewalkers' specially designed tools couldn't dislodge a balky bolt interfering with repairs Sunday at the Hubble Space Telescope. So they took an approach more familiar to people puttering around down on Earth: brute force.

And it worked. But it set spacewalkers so far behind that they couldn't get all their tasks done.

Atlantis astronaut Michael Massimino couldn't remove an 1.25-inch long bolt attaching a hand rail to the outside of a scientific instrument he needed to fix. The rail had to be removed or at least bent out of the way.

That was only the beginning of a hard-luck day. The balky bolt and other tiny problems put spacewalkers so far behind schedule that they had to abandon the second part of their spacewalk: replacing some worn insulation on the telescope.

NASA, which prides itself on being prepared, had not anticipated a bolt problem while removing the 1.5-foot long hand rail, said lead flight controller Tony Ceccacci.

Astronomers, whose nerves were tried by the spacewalk, were still happy because it was the second straight resurrection of a much-used but dead scientific device.

"The science capabilities we've been given today are fabulous," Jennifer Wiseman, NASA's chief of stellar astrophysics said at a late Sunday news conference. "It's almost like starting with a brand-new observatory."

The marathon spacewalk by Massimino and Michael Good took so long — just more than eight hours — that it was the sixth longest U.S. spacewalk and a few minutes longer than the one Friday.

Three of four screws holding a Hubble handrail in place came out fine. The fourth was stripped. The handrail blocked access to the real trouble spot - a failed power supply and circuit boards, reports CBS News science and technology correspondent Daniel Sieberg.

When several tries with different expensive tools couldn't remove the stripped-out bolt, Mission Control in Houston told Massimino to go for the less precise yank.

At Goddard Space Flight Center in Maryland, engineers twice tested that pull on a mock-up before Massimino was told to use his muscles.

"You hope you don't get to the point where you just close your eyes and pull and hope nothing (bad) happens," said James Cooper, the Goddard mechanical systems manager for the repair mission. "But we had run out of other options."

Astronauts were careful to tape pieces so they wouldn't fly away and become potential missiles.

"This is like tying branches together in Boy Scouts," Good said.

Since Atlantis was out of video contact 350 miles above Earth, controllers in Houston could only listen as Massimino took a breath and pulled.

After a second of silence, Massimino calmly said: "disposal bag, please."

After nearly two hours of work on the balky bolt, astronauts went back to the plan to bring the Space Telescope Imaging Spectrograph back from the dead.

That broke down in 2004, but it was never designed to be repaired. To prevent the tiny screws from getting inside the telescope or floating into space, aerospace company ATK created a "cover plate" to catch them, Sieberg reports.

Early test results show the spectrograph, disabled by a power failure five years ago, was brought back to life. When further tests started, a glitch popped up, but NASA officials were confident the device would be fine.

Three of the four Hubble spacewalks so far have been delayed by niggling problems, like stubborn bolts and objects that wouldn't fit. A fifth and final spacewalk is set for Monday.

Massimino's run of bad luck continued. While trying to install a special plate to remove 111 tiny screws that held the instrument cover in place, a tool's battery died. It took more than half an hour for him to go back to the shuttle, swap out batteries and recharge his oxygen supply.

By the time Massimino replaced the internal electronics power supply card in the spectrograph, it was just about the originally scheduled time for the end of the spacewalk. And more than 90 minutes of clean-up and close-out work remained.

So spacewalk coordinators on the ground decided that the second part of Sunday's task, the insulation, had to be put off until Monday, if possible.

All the work may not get done Monday, but at least part will be attempted, Mission Control said.

"We're very proud of you," Atlantis astronaut John Grunsfeld told the weary spacewalkers.

Grunsfeld and Andrew Feustel will not only pick up some of their work Monday, but they will be the last people to touch the 19-year-old observatory.

On Tuesday, Atlantis will release Hubble, which NASA hopes will keep operating for another five to 10 years, before it is steered to a watery grave.

On Saturday, two other astronauts revived Hubble's survey camera. Early Sunday, Mission Control told the crew two of the three science channels on the repaired camera were working again.

When NASA planned this mission, officials said it would be a success if either of the two dead instruments could be revived. With Saturday's camera remedy, fixing the spectrograph is a bonus.

The light-separating spectrograph has helped find black holes and examine the atmosphere of planets outside our solar system.

[ericgarrison]

hetup-2009: You may want to increase your meds...and lock the gun cabinet.

[hetup-2009]

Space, WOW...can't see all the tortured people, can't see the hungry, the cold, the jobless, the sick. If you like it so much go there, stay there, and don't look back with your stupid telescope either. I have no use for you here so get packing.

[grabandgo]

Really exciting news. They had to pull hard on a wrench.
what a joke!

[tbbaot]

The bottom line is they got the job done. Cheers for the men and women of NASA. The public has become bored with the amazing things these people do every day for our country. They are a source of pride and deserve our admiration.

[Slrman]

grabandgo - What a spokesperson for the "Dumbing down of America" you are. If you are so insistent upon wallowing in ignorance and stupidity, you could start your own country somewhere and live in caves and eat raw meat (if you could catch any) with your fellow neo-cons. That would leave truth and progress to those best equipped to understand and appreciate it.

[Slrman]

hetup-2009 - Obviously Luddites like you don not care. But ignorance has always been preferable to knowledge to people like you. After all, it's easier to no think than to learn anything new. No wonder you all cling to religion. That discourages thinking and new knowledge and that suits you just fine.

[hetup-2009]

What a waste of resources, does anyone even care anymore?

[opsurfer]

Will everyone who is SICK and TIRED of conservatives who BLEW our budget, our country and our ideals straight down the toilet, only to come back complaining about our space/ science research/ NASA budget please post something that says

AYE!

Cost of Iraq War so far - $669,836,000,000
Cost of funding NASA over the same period of time- $122,168,000,000

GET THE POINT?? We need to discover another livable planet, so we can ship conservatives there!

[grabandgo]

floating around earth in a closet is not space exploration

[Snowhare]

And always the money-issue.
Of course, money is scarce and should be spent to satisfy human needs.
But I never understood why Americans (of all the people in the world) don't see that equipping (Space-)ships and sending them out to discover new, unknown realms (of space now and of earth 300 years ago) is something that furthers the progress of mankind!

[grabandgo]

The wants of the few outnumber the needs of many!
NASA is a black hole for money!