NASA will honor the astronauts killed in the Apollo 1, Challenger and Columbia space disasters.
Under President Barack Obama, NASA is following a bold mission to send astronauts to an asteroid, and then to Mars.
Astronomy teacher Josh Lake of Pomfret, Conn., inspired Hubble telescope scientists to create a new cosmic image.
Asteroid Apophis is larger than three football fields and will fly closer to Earth than many satellites.
The potentially dangerous asteroid Apophis is 20 percent wider and 75 percent more massive than scientists thought.
The giant planet orbiting the star Fomalhaut has an extreme orbit that may crash through a dusty wasteland.
Actor William Shatner of "Star Trek" fame used Twitter to talk with an astronaut on the International Space Station.
American astronaut Scott Kelly and Russian cosmonaut Mikhail Kornienko will spend one year in space in 2015.
A Russian Soyuz capsule landed safely in Kazakhstan to return three astronauts to Earth after a four-month mission.
A Russian Soyuz space capsule undocked from the International Space Station to return three astronauts home.
The space station is the largest manmade structure in orbit today, but it helps to know when it can be seen.
The photos, taken by different satellites, show Hurricane Sandy on the entire disk of Earth, and a nighttime view.
Today's full moon makes high tides 20 percent higher than normal and can amplify Hurricane Sandy's storm surge.