The Messenger spacecraft has discovered unusual hollow formations on Mercury's surface. No one knows what causes them, but volatile-spewing volcanoes are candidates.
Using data gathered by the Kepler Space Telescope, a legion of amateur planet-hunting volunteers have perhaps uncovered the existence of two alien worlds.
Sky & Telescope's November 2011 issue is now available to digital subscribers.
Although funding has eroded for SETI@home and the Allen Telescope Array in the past few years, both alien-hunting projects have survived, thanks to donors and volunteers.
The HARPS planet-hunting spectrograph of the European Southern Observatory has just produced 50 more worlds one of which may be not too hot, and not too cold by Earth-creatures' standards.
Where can you go in the Midwest to view the night sky unimpeded by light pollution? Ohio has a spot for you.
Despite threats by the House of Representatives to cut funding, the James Webb Space Telescope plans move ahead.
Think you know all the kinds of alien worlds? Think again. Two astronomers have just added another weirdo to the list: an exoplanet darker than powdered charcoal.
New observations are beginning to uncover the origins of some Type Ia supernovae.
NASA's Mars Reconnaissance Orbiter has found perplexing dark streaks that form seasonally and strongly suggest that liquid water flows on the Martian surface.
Arizona amateur Bruce Gary is assembling a pro-am team to look for planets orbiting dead stars.
A team of scientists has found two white dwarfs locked in a close mutual orbit, providing an excellent chance to test Einstein's general theory of relativity.
Astronomers have determined that a recent supernova in the Large Magellanic Cloud created a half-Sun's worth of dust — hinting that such stellar explosions might be an unexpectedly rich source of dust throughout the universe.
Astronomers using the Hubble Space Telescope have discovered a new moon orbiting the icy planet Pluto.
Observations of June 15th’s total lunar eclipse suggest that smoggy skies over China created unusual patterns in the umbral glow on the Moon.
Astronomers have observed a neutron star flaring to 10,000 times its original brightness.
Recent findings hint at the possibility of a saltwater ocean beneath Enceladus's icy surface.