Venus Express has made the first detection of an atmospheric loss process on Venus's day-side. Last year, the spacecraft revealed that most of the lost atmosphere escapes from the night-side.

Aboard the ISS, Commander Mike Fincke and Flight Engineer Sandy Magnus paid tribute to the crew of Apollo 8 in commemorating the 40th anniversary of the flight of Frank Borman, James Lovell and Bill Anders, who became the first humans to orbit the moon.

Promo for NASA television.

THEMIS has overturned a longstanding belief about the interaction between solar particles and Earth's protective magnetic field. This could help predict when the solar storms that disrupt power grids, satellites & GPS signals, could be especially severe.

The idea of the Invention Challenge is to show students that math and science can lead to some very fun and entertaining projects.

New findings bolster the argument that dark energy is the reason our universe is expanding. James Williams explores the evidence.

An update on the Constellation program featuring Ares, Orion and Altair.

Follow along as the Space Shuttle Endeavour is mated to NASA's 747 for the journey back to the Kennedy Space Center.

Hubble has contributed much to our understanding of the universe. Here's some of the highlights.

NASA wants your help to name its next rover to Mars.