It is still too early to tell exactly where the dead satellite will fall. Scientists will likely have a much better idea of where the debris will land about two hours before the impact, NASA officials said.
An analysis by the Union of Concerned Scientists suggests that just about everything that the Air Force's new X-37B robotic space plane can do could be done using cheaper technology.
Europe is ramping up efforts to detect incoming asteroids. Scientists and astronauts met for the first time in Germany to discuss options for defending the Earth from asteroids.
President Obama's national space policy, released Monday, focuses more on international approaches to space issues than previous presidents' policies.
Amateur astronomers say they have found the X-37B in an orbit that takes it over Afghanistan and Iraq. A former Air Force missile officer offers up four possible uses for the space plane – and weapon is least likely.
President Obama's budget for NASA seeks to end its back-to-the-moon program, rely more heavily on private companies, and invest in new technologies for human space exploration.
The International Space Station’s narrow miss last week highlights the risk of collisions with space junk.
Without Russia, NASA couldn’t send astronauts to the space station between 2010 and 2015.
As more countries race to launch satellites and manned craft, some warn of a space jam.