Busy Neighbor
A planet (right) orbits close to Alpha Centauri B, the second-largest star of the triple Alpha Centauri system, in this…
Young Giant
A young Jupiter-like planet orbits far from its star in this artist's concept. McDonald Observatory astronomers are looking for similar…
Stepping Out
Astronaut Ed White makes the first American spacewalk as he floats outside his Gemini 4 spacecraft on June 3, 1965.…
Big Gulp Aftermath
X-ray energy forms expanding rings around the black hole V404 Cygni in this series of images from the Swift X-ray…
Worlds of Worlds
This artist’s concept depicts two moons orbiting a Jupiter-like planet in another solar system, as seen from the surface of…
Two-Fer
Saturn’s icy moon Enceladus (background) slides behind Dione in this series of images shot by the Cassini spacecraft on September…
Hiding an Ocean
A deep ocean may lie far below the icy crust of Ganymede, the largest moon of Jupiter. In this image,…
Lunar Eclipse
The Moon will pass through Earth’s long shadow on the night of September 27, creating a total lunar eclipse, such…
Brilliant Encounter
Venus and Jupiter, the brightest objects in the night sky other than the Moon, are staging a spectacular encounter in…
Blue Snowball
A Hubble Space Telescope image shows NGC 7662, the Blue Snowball Nebula, which is the final act of a dying…