Light Pillars over Alaska
What’s happening behind those houses? Pictured here are not auroras but nearby light pillars, a nearby phenomenon that […]
NASA
Advanced LIGO: Gravitational Wave Detectors Upgraded
Accelerate a charge and you’ll get electromagnetic radiation: light. But accelerate any mass and you’ll get gravitational radiation. […]
Five Planets at Castell de Burriac
February’s five planet line-up stretches across a clear sky in this predawn scene. A hilltop Castell de Burriac […]
Massive Stars in NGC 6357
Massive stars lie within NGC 6357, an expansive emission nebula complex some 6,500 light-years away toward the tail […]
Dwarf Planet Ceres
Dwarf planet Ceres is the largest object in the Solar System’s main asteroid belt, with a diameter of […]
Galaxy Wars: M81 versus M82
In the lower left corner, surrounded by blue spiral arms, is spiral galaxy M81. In the upper right […]
Comet 67P from Spacecraft Rosetta
Spacecraft Rosetta continues to circle and map Comet Churyumov-Gerasimenko. Crossing the inner Solar System for ten years to […]
Find the Man in the Moon
Have you ever seen the Man on the Moon? This common question plays on the ability of humans […]
MWC 922: The Red Square Nebula
What could cause a nebula to appear square? No one is quite sure. The hot star system known […]
A Five Planet Dawn
As January closes and in the coming days of February, early morning risers can spot the five naked-eye […]