October is pleasant for nighttime observing because evenings are cool and come early. Use our downloadable stargazing podcast to find the month's highlights.
Lonely Fomalhaut turns out to have plenty of company. Learn how to find its two remarkably distant stellar companions.
New data collected by Galaxy Zoo show early galaxies with central bars, providing implications about how galaxies grow.
Start your day with an eclipse of the full Moon! On the morning of October 8, 2014, a total lunar eclipse will be visible across most of North America.
Learn exactly how and when to expect the next display of the northern lights with a few easy-to-use online tools.
A new analysis of Planck data bolsters the claim that the polarization signal heralded as evidence for cosmic inflation is from dust instead.
It's a historic day for India's maturing space program, as its first-ever interplanetary explorer successfully slipped into orbit around the Red Planet.
Astronomically speaking, the fall season comes to the Northern Hemisphere on Tuesday, September 23, 2014 at 02:29 UTC (Monday, September 22 at 10:29 p.m. EDT). At that moment, the Sun passes over the Earth’s equator heading south; this event is called the autumnal equinox.
On September 21st, after a 33-minute-long rocket firing, NASA's Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft slipped into orbit around the Red Planet.
Astronomers have detected a supermassive black hole in the center of a tiny galaxy — where it has no right to be.
NASA’s Night Sky Network is conducting a new survey in order to better help the amateur astronomy community.
European space officials have decided to drop their Philae lander on November 11th onto the small end of the already-active Comet 67P/Churyumov–Gerasimenko. Success is hardly assured.
Now two years into its exploration of Mars, NASA's big rover has reached the base of the huge mound that scientists hope will reveal the Red Planet's history.
On Wednesday, a powerful X-class flare ripped through the Sun's lower atmosphere and sent a blast wave directly toward Earth that should arrive Friday and produce moderate-to-strong auroras over the weekend.
A new diagram might link the diverse visible-light characteristics of quasars to two physical properties — essentially, their accretion rate and orientation. If the analysis holds up, it could point the way toward a long-sought unification.
Get acquainted with SS Cygni, the sky's brightest cataclysmic variable star. It's guaranteed to keep you on your toes.
The Subaru Telescope has donned a new pair of glasses called Raven, a multi-object adaptive optics system that enables astronomers to correct for atmospheric turbulence over an unprecedented field of view.
International Observe the Moon Night is an event that encourages people to "look up" and enjoy our nearest neighbor. This year's InOMN is Saturday, September 6th. Here's a quiz: What astronomical object looks amazing no matter what the magnification, never looks exactly the same no matter how often you view it, and can be...
Astronomers have mapped the cosmic watershed and discovered a massive supercluster that extends more than 500 million light-years and contains 100,000 large galaxies. The Milky Way sits on the edge of this humongous structure.
Watch as the moon Rhea steals a star from the sky for nearly a minute on September 12th.
A new analysis suggests that hot super-Earths might be the skeletal remnants of hot Jupiters stripped of their atmospheres.
The astronomical calendar says autumn arrives on September 22nd. It's a season of transition, with plenty of celestial comings and goings in the evening sky. September’s equinox takes place on the 22nd at 10:29 p.m. Eastern Daylight Time. At that moment the Sun shines directly overhead as seen from the equator. Days and nights...
Astronomers are tracking down the seeds that likely grew to become today’s most massive elliptical galaxies.
A new measurement, made using radio interferometry, argues that the distance to the Pleiades star cluster measured by ESA's Hipparcos satellite really is wrong — and that ground-based astronomers had it right all along.
With a subtle beauty all its own, the earthshine we see glowing in the lunar night invites us to consider Earth's many connections to the Moon.