The most distant stars discovered in the Milky Way might have been ripped away from a companion galaxy.
Japan’s Venus orbiter has witnessed a huge atmospheric wave that spans the globe.
Astronomers suspect the Sun’s closest stellar neighbor, Proxima Centauri, desiccated its potentially rocky exoplanet, destroying the planet’s chances for habitability.
Astronomers have observed the motion of distant star clusters (such as the one pictured here) to measure our galaxy’s mass. The new estimate places the Milky Way in the lightweight class of galaxies.
Astronomers have combined data from the Voyager spacecraft and the Hubble Space Telescope to probe the stuff between the stars.
The Chandra X-ray Observatory has gazed at a small patch of sky for almost 12 weeks, revealing 1,008 X-ray-emitting sources – most of them supermassive black holes.
After dinnertime, the bright, equilateral Winter Triangle glitters in the southeast. Early in the dawn of Sunday the 22nd, spot the waning crescent Moon hanging in the southeastern sky.
Late sunrises make it easy to follow the parade of planets at dawn, including a nice apparition of Mercury this week and three successive lunar conjunctions.
Vesta is at opposition, shining at 6th magnitude in Gemini as it awaits your binoculars or small scope.
Download our monthly astronomy podcast to spot Venus and Mars in the west — and two star clusters high up — after sunset.
You won’t want to miss S&T‘s live webinar on Saturday, January 28th. Hear Alan Stern’s personal take on how NASA’s New Horizons spacecraft got to Pluto and what we learned once it got there.
S&T Contributing editor Govert Schilling explores two unique astronomical sites that lie under the dark skies of Namibia.