Yellowknife Bay Formation on Mars

This mosaic of images from Curiosity's Mast Camera (Mastcam) shows geological members of the Yellowknife Bay…

Fifteen Years Ago, International Space Station Assembly Begins

On Dec. 6, 1998, the crew of space shuttle mission STS-88 began construction of the International…

A Stellar Nursery

Illuminated by the light of nearby stars, the nebula M-78 exhibits a ghostly appearance in this…

Orion Heat Shield Transported Aboard Super Guppy Plane

The heat shield for NASA's Orion spacecraft was loaded onto a Super Guppy plane in Manchester,…

Forty Years Ago, Pioneer 10’s Closest Approach to Jupiter

On Dec. 4, 1973, NASA's Pioneer 10 spacecraft sent back images of Jupiter of ever-increasing size.…

View of the Transantarctic Mountains

This image of the Transantarctic Mountains was taken from the NASA P-3 airborne laboratory on Nov.…

Sunlit Edge of Saturn’s Largest Moon, Titan

The sunlit edge of Titan's south polar vortex stands out distinctly against the darkness of the…

Black Holes Have Simple Feeding Habits

At the center of spiral galaxy M81 is a supermassive black hole about 70 million times…

Comet ISON Streams Toward the Sun

In the early hours of Nov. 27, 2013, Comet ISON entered the field of view of…

Lighting the Paths Across the U.S.

Thanksgiving is a time for family, for feasting, and for gratitude in the United States. It…