NASA

On certain dates in February, an elusive firefall can be spotted at sunset in Yosemite National Park, when the weather cooperates and the direction to the setting Sun is just […]

What’s happened to giant star N6946-BH1? It was there just a few years ago — Hubble imaged it. Now there’s only a faint glow. What’s curiouser, no bright supernova occurred […]

What’s up in the sky this summer? The featured graphic gives a few highlights for Earth’s northern hemisphere. Viewed as a clock face centered at the bottom, early summer sky […]

What surrounds the famous belt stars of Orion? A deep exposure shows everything from dark nebula to star clusters, all embedded in an extended patch of gaseous wisps in the […]

On May 19, the Juno spacecraft once again swung by Jupiter in its looping 53 day orbit around the Solar System’s ruling gas gaint. Beginning at the top, this vertical […]

Add GW170104 to the chart of black holes with known mass. The extremely energetic merger of two smaller black holes corresponds to the Laser Interferometer Gravitational-wave Observatory’s (LIGO) third detection […]

Jupiter is stranger than we knew. NASA’s Juno spacecraft has now completed its sixth swoop past Jupiter as it moves around its highly elliptical orbit. Pictured, Jupiter is seen from […]

Sweeping through this stunning field of view, Comet 71P/Clark really is in the foreground of these cosmic clouds. The 2 panel telescopic mosaic is color enhanced and is about 5 […]

Big, beautiful spiral galaxy NGC 6744 is nearly 175,000 light-years across, larger than our own Milky Way. It lies some 30 million light-years distant in the southern constellation Pavo appearing […]