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NASA Phoenix Mission Set for Mars Landing on May 25

NASA's Phoenix Mars Lander is set to end its long journey and begin a three-month mission to sniff and taste fistfuls of Martian soil and buried ice. The challenging landing on the Red Planet is set for the evening of May 25. › Visit Phoenix Section

Photo Gallery: Discovery Prepares for Flight on STS-124 Mission

See behind the scenes photos of the shuttle, astronauts and the Japanese Kibo module during preparations for launch at NASA's Kennedy Space Center in Florida. › View Photo Gallery and Share Comments

Chandra Uncovers Youngest Supernova in Our Galaxy

Our galaxy's most recent supernova has been found by tracking the rapid expansion of its remains. The 140-year old explosion about 140 could help scientists better estimate how often the stellar explosions occur. › Read More and Comment

Image of the Day Gallery

Nardo Ring, Italy

The Nardo Ring is a striking visual feature from space, and astronauts have photographed it several times. The Ring is a race car test track that is steeply banked to reduce the amount of active steering needed by drivers. The Ring lies in a remote...

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Interactive Features

STS-124: Interactive Mission Timeline

Discovery and crew deliver the main segment of Japan's Kibo module to the International Space Station.
STS-124 Image Gallery

View preflight, launch and landing photos of space shuttle Discovery and the STS-124 crew at Kennedy Space Center.
Alan Shepard: First American in Space

Alan Shepard rode his Freedom 7 capsule into history on May 5, 1961.