How can we see what is invisible? Black holes are not easy to see in the dark cosmic night, but astronomers can find them by analyzing their gravitational effects on […]

We are one small step closer to returning to the Moon. A new chapter in human exploration began yesterday when NASA’s Artemis II launched aboard the Space Launch System (SLS) […]

What are these Earthlings trying to tell us? The featured message was broadcast from Earth towards the globular star cluster M13 in 1974. During the dedication of an upgrade to […]

Robert H. Goddard, considered the father of modern rocketry, was born in Worcester Massachusetts in 1882. As a 16 year old, Goddard read H.G. Wells’ science fiction classic “War Of […]

Scanning the skies for galaxies, Canadian astronomer Paul Hickson and colleagues identified some 100 compact groups of galaxies, now appropriately called Hickson Compact Groups. The four prominent galaxies seen in […]

What is the sound of two black holes merging in deep space? Sound waves don’t propagate in vacuum, but gravitational waves do. In 2015 we were able to “hear” them […]

In the words of today’s astrophotographer, Rositsa Dimitrova, “What have these silent sentinels watched pass across the sky?” The volcanic mo’ai (meaning statue) of Ahu Tongariki stand guard over Rapa […]

What’s happening at the end of that street? Pictured here are not auroras but light pillars, a phenomenon typically much closer. In most places on Earth, a lucky viewer can […]

Spiral NGC 1300 and elliptical NGC 1297 are galaxies that lie on the banks of the southern constellation Eridanus (The River). At 70 million light-years distant or more, both are […]

A lone tree stands in a quiet meadow in Guadalajara, Spain, silhouetted against the Cygnus region rising above like flames in the night sky. This deep night skyscape is a […]