Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
NASA employees are 'mission-critical', and they would be able to remain on the job in the event that a 2011 budget is not approved by March.
As the shuttle program begins to end, a look at Discovery's past and future.
The shuttle lifted off at 4:53 p.m. EST from the Kennedy Space Center, riding a flame-tipped pillar of smoke across the Atlantic Ocean.
From its orbits around the Earth to number of first time astronauts it has shuttled, a look at Discovery's achievements.
Spacecraft will measure Jupiter's magnetic field while avoiding the giant planet's harsh radiation.
Six veteran astronauts are gearing up for the shuttle's final voyage into space next week.
Locations that provide an opportunity to see a shuttle launch are scarce, but worth it.
Despite a minor leak, Discovery is ready for its last launch.
Space shuttle draws its name from a famous English explorer, and will be carrying a memento from the Royal Society to commemorate the event.
Black holes are some of the most mysterious objects in the universe — what is left behind after a star has collapsed. NASA has compiled several dramatic images of what are believed to be black holes in space.
Experts: Work needs to be done in order to forecast solar storms, and to prepare safeguards against electrical malfunctions.
Shuttle will deliver a humanoid robot and an additional storage room for the International Space Station.
A solar storm could disrupt technologies, scorch satellites, crash stock markets and cause power outages that last weeks or months.
A NASA spacecraft heading for Mercury beams back an amazing space photo: A family portrait of all the major planets except Uranus and Neptun.
Intense solar flares, on track for the next two years, can wreak havoc on electronic communications, potentially causing up to $2 trillion in damages.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.