... and only now can we declare this mission a total success the astronauts are safely on the ground," NASA sciences chief Ed Weiler told a Florida press conference. Atlantis' crew had waited since Friday for the go-ahead to land as Mission Control ...

... have done so indirectly, by measuring changes in gravity, speed or light around stars. NASA's space sciences chief Ed Weiler said the actual photos are important. He compared it to a hunt for elusive elephants: "For years we've been hearing ...

... It's been a year of sleepless nights," NASA's Mars program director, Scott Hubbard, said following liftoff. Ed Weiler, head of NASA's space science program, called the late-morning launch "absolutely fantastic." But he cautioned ...

... million more to build atomic-powered generators that can fly on spacecraft. Such atomic-driven energy systems, said Ed Weiler, NASA's associate administrator for science, would eventually free NASA from a dependance on chemical rockets, which ...

... elements -- or pixels -- stand out against a dark background, suggesting the presence of the $165 million probe, said Ed Weiler, associate administrator for NASA's office of space science. However, neither of the agencies can yet confirm whether ...

... planets was considered an essential step toward finding life. "All of these planets are Jupiter-size or larger," said Ed Weiler, NASA's associate administrator for space science. "No Earth-like planets have been found, but we don't yet ...

... guidance and control equipment on Compton reduces that risk of fatality to about one in 29 million. NASA chief scientist Ed Weiler said he chose safety over science. "How much science is worth the risk of even one human life?" Weiler asked when ...

... the space business that if something's working well, you don't turn it off and just hope it comes back on," said Ed Weiler, NASA's space science chief. "We're not doing that cavalierly. We fully anticipate that everything will work fine ...