Astronauts install new camera on Hubble

CAPE CANAVERAL, Florida — Using elbow grease to avert disaster, a spacewalking astronaut battled a stubborn bolt to pull an outdated camera out of the Hubble Space Telescope on Thursday. His success paved the way for the installation of a more powerful camera that will allow the telescope able to peer even further into the past.

Astronaut Andrew "Drew" Feustel unexpectedly ran into trouble on Thursday as he attempted to turn a bolt holding the 15-year-old Wide Field Planetary Camera 2 onto the observatory. Feustel tried various tools to pry out the bolt, but it would not budge. If the bolt had broken off as he wrenched it, the old camera would've stayed in the telescope and its $132 million replacement would've had to return to Earth.

In the end, the combination of a different tool and sheer muscle saved the day.

"I think I got it!" exclaimed Feutsel, who was making his first spacewalk, as he pried the bolt out.

Feustel had less success later in the spacewalk, when he tried to install some mechanisms that would make it easier to open up the telescope for repairs.

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"That'll do it, we hope," as he tried once again to turn a sticky bolt. "Been doing a lot of that."

Feustel and six crewmates are making the fifth and final house call to the renowned Hubble. The astronauts, who pulled up to the telescope Wednesday aboard space shuttle Atlantis, are scheduled for a whirlwind six-day stay to upgrade and repair the telescope for the last time.

Thursday's outing was the first of five spacewalks in five consecutive days. It was supposed to be a straightforward jaunt, so much so that before Atlantis launched, Hubble program manager Preston Burch pegged the odds of success at close to 100%.

The aging Wide Field 2 had other plans. When it came time to slide the old camera out of its slot on the telescope, Feustel tried first one tool, then another and another to turn the bolt that latched the camera to Hubble. Veteran spacewalker John Grunsfeld, Feustel's partner, even double-checked that Feustel had positioned his tools correctly.

The stakes were high. Though Wide Field 2 has been a workhorse for the Hubble, astronomers are anxious to start using its successor, Wide Field Camera 3, which promises to be 15 to 40 times more powerful. For instance, Wide Field 3 promises to give astronomers a view of galaxies forming just after the Big Bang.

There will be no more opportunities for Wide Field 3 to return to the Hubble. The only spacecraft capable of visiting the telescope is the shuttle, and it will be retired next year without making any more Hubble flights.

Luckily, Feustel found the right tool for the job and exerted enough force to get the bolt out.

"It's been in there for 16 years, Drew, and it didn't want to come out," said Grunsfeld.

"It just decided to be a recalcitrant teenager," said astronaut Michael Massimino, who was supervising the spacewalk from inside Atlantis and has a 13-year-old daughter and a 15-year-old son.

Later in the spacewalk, balky hardware did defeat Feustel as he tried to install some latches on the access doors to Hubble's interior. He got two in place but did not manage the third.

"It was a day of surprises," Feustel said as he prepared to re-enter Atlantis. "In traditional Hubble fashoin, Hubble threw us a few curves," said Grunsfeld, who was making his sixth spacewalk to service the telescope. "We were able to overcome them." He noted that they installed both the new camera and a replacement electronics box that routes data to and from the ground. The original box broke down in September.

The problems dragged the spacewalk out to nearly seven-and-a-half hours, an hour longer than planned and an hour longer than NASA likes to keep its spacewalkers "outside" in the vacuum of space.

"Ready for a hot shower and a good meal," said Grunsfeld as he prepared to re-enter Atlantis's hatch. "We'll see what we can do," Massamino promised his crewmate.

Copyright 2009 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Atlantis grabs Hubble Space Telescope

CAPE CANAVERAL — Atlantis' astronauts grabbed the Hubble Space Telescope on Wednesday, then quickly set their sights on the difficult, dangerous and unprecedented spacewalking repairs they will attempt over the next five days.

Hubble and Atlantis are flying in a 350-mile-high orbit littered with space junk. The shuttle already has an ugly stretch of nicks from Monday's launch, but the damage is considered minor and poses no safety threat. NASA continued to prep another shuttle, though, just in case Atlantis is hit by orbital debris and the crew needs to be rescued.

After seven years of orbital solitude, Hubble looked surprisingly well. Flight controllers gasped when the telescope first came into view.

"It's an unbelievably beautiful sight," reported John Grunsfeld, the telescope's chief repairman. "Amazingly, the exterior of Hubble, an old man of 19 years in space, still looks in fantastic shape."

NASA hopes to get another five to 10 years of dazzling views of the cosmos from Hubble, with all the planned upgrades, which should leave the observatory more powerful than ever.

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Shuttle robot arm operator Megan McArthur used the 50-foot boom to seize the school bus-sized telescope as the two spacecraft sailed 350 miles above Australia. Then she lowered the observatory into Atlantis' payload bay, where cameras checked it out.

Going into the mission, Hubble scientists and managers warned that Hubble might look a little ragged because it hasn't had a tuneup since 2002. But initial observations showed nothing major.

"Everybody's very excited up here, I can tell you," said Grunsfeld, who will venture out Thursday with Andrew Feustel. They will replace an old Hubble camera that's the size of a baby grand piano, as well as a science data-handling unit that failed in September and delayed Atlantis' flight by seven months.

This is the fifth time astronauts have called upon Hubble. The previous overhauls went well, but those repairs were straightforward, with spacewalkers pulling equipment in and out. This time, Grunsfeld and his team will venture into the guts of broken instruments.

"Don't hold us to too high a standard," NASA space operations chief Ed Weiler warned before Monday's launch. "We're trying to do two things that we've never done before, take apart instruments that aren't designed to be taken apart in space and operated on by gloved astronauts, and fix them after pulling out 110 or 111 screws.

"That's one heck of a challenge."

Two teams of spacewalking astronauts — two men per team — will take turns stepping outside. Besides swapping out the old camera and science data unit, they will replace Hubble's batteries, gyroscopes and a pointing mechanism. They also will install fresh thermal covers on the telescope, along with a docking ring so a future spacecraft can guide the telescope into the Pacific Ocean sometime in the early 2020s.

And in the toughest challenge, they will open up the two broken science instruments to replace fried electronics.

No one will visit Hubble after the Atlantis astronauts leave next week, so NASA crammed as much as it could into the five spacewalks and poured more than $1 billion into the mission. Managers also chose two experienced spacewalkers who have been to Hubble before, Michael Massimino and Grunsfeld, who is making a record third visit.

Atlantis is loaded with 180 tools; 116 were designed for this 11-day mission.

"We've set the bar extraordinarily high for ourselves," said senior project scientist David Leckrone, "and nobody should consider this mission a failure or any of the crew a failure if for some reason we don't get all things done to the 100% level."

The mission almost didn't happen.

A year after the 2003 Columbia tragedy, NASA canceled the repair effort, saying it was too dangerous. The astronauts would not have anywhere to seek shelter because the international space station is in a different, inaccessible orbit.

But a new NASA regime reinstated the flight in 2006 after shuttle repair techniques were developed and tested in orbit. A plan also was put in place to have a shuttle on the launch pad to blast off within days for a rescue. Since then, Hubble's unusually high orbit has become dirtier as a result of satellite smashups; even a small piece could pierce the shuttle or the suit of a spacewalker.

Shuttle Endeavour will remain on standby until Atlantis and its crew of seven head back to Earth at the end of next week.

Copyright 2009 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.