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Tonight’s broadcast, high risk. Why there’s so much danger attached to the shuttle Atlanta’s mission that launched today? Tonight, they’re in space and the challenge is just beginning. Change at the top. The US commander in Afghanistan is out. We’ll look at what this means for our 7-year war. Nightly News begins now. From NBC News world headquarters in New York, this is NBC Nightly News with Brian Williams.

 

Good evening. It would be the equivalent동등한 of sending your family on a trip by car that’s so potentially dangerous. A second car has fueled up with a driver ready to go get them in case of an accident. Tonight, seven shuttle astronauts are in space. They launched a few hours ago. They’re going to fix the Hubble Space Telescope. They are flying an aging spacecraft up to an altitude고도 of 350 miles. The problem with that is that’s where a lot of space debris파편 orbits선회하다, circling the earth at blazing speeds every second. That is why the danger, why there’s a backup mission on the pad발사대 and ready to go. Tom Costello starts us off tonight.

 

“And… liftoff of space shuttle Atlantis.” From launch pad 39-A, one last mission to give an old friend a new lease on life수명을 늘리다… a fifth and final flight to save Hubble. The Hubble Telescope has given NASA both headaches and triumphs. The size of a city bus orbiting 350 miles above the earth! Hubble has allowed us to peer into자세히 들여다보다 the darkest reaches of the cosmos우주, revealing a star burst별 폭발 of galaxies and planetary gases우주성운. Star clusters성단, cosmic pearls, a sculpture of gas and dust from a dying star, and an infrared적외선 view of Saturn토성. And all of it helping to rewrite physics textbooks back on earth. “We’ve always known that the universe is expanding. But Hubble’s proved that it’s not only extending, but it’s accelerating.”

 

It was Hubble that helps scientists determine that Pluto명왕성 really isn’t a planet, but rather an orbiting ball of ice. And through Hubble, we learned more about the universe than we ever knew. Hubble was launched in 1990. Today, its batteries are dying. Its gyroscope’s failing. Three of its scientific instruments broken. The repairs and upgrades will require five risky space walks. And NASA worries the space shuttle is at a greater risk of being hit by space junk in Hubble’s orbit. Should the shuttle be damaged, the space station will be out of reach. So for the first time ever, a second rescue shuttle Endeavor is now on the pad ready to fly.

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