Noctilucent clouds form at the boundary between Earth and space. Their electric blue billows incite the imagination and inspire us to keep watch at dusk for their arrival.
Since Thorne-Żytkow Objects were proposed forty years ago, no one has actually seen one of these exotic stellar hybrids – until now.
The prolific comet hunter William A. Bradfield tallied 18 comets in his lifetime, each discovered visually and credited to him alone.
Researchers have announced interesting news concerning the Moon, especially about how and when it formed, and why the "Man in the Moon" constantly stares at us whenever the lunar disk is fully lit.
Watch in-depth interviews with some of the top vendors at the 2014 Northeast Astronomy Forum featuring new telescopes, mounts, filters, and more.
Newly published observations provide the first real evidence supporting a theory that tells us how black hole jets form.
Since C/2012 K1's discovery two years ago, this first-time visitor from the outer solar system has brightened steadily and is now within reach of a small telescope and even binoculars.
NASA’s crippled planet-hunting spacecraft has been reworked for at least two years of productive new missions.
Exoplanet missions are shifting their goals from counting to characterizing, with multiple instruments coming online to directly image these alien worlds.
Kapteyn’s star — a nearby star that likely formed outside this galaxy — hosts two planets more than twice as old as Earth.
A new study finds every stage of star formation in a single cloud, firmly backing a popular star-formation recipe.
Data from NASA's Kepler space telescope point to three distinct molds of exoplanets — rocky worlds, gas dwarfs, and ice/gas giants — distinguishable based on the abundances of heavy elements in their host star’s atmosphere.
New analyses suggest that observations heralded as evidence for the universe’s brief growth spurt don’t conclusively show what researchers thought they did.
Although its scientific work for NASA ended in the early 1980s, the International Sun-Earth Explorer never quite died — and this week it was revived by a team of volunteers intent on letting it continue exploring interplanetary space.
Two elements deep within Cassiopeia A, hint the supernova remnant underwent a quark nova — a theoretical second explosion that leaves behind a quark star — just days after the original supernova.
Two star parties in late May, including one of the biggest in the world, drew together beginners and experienced astronomers alike.
Sky & Telescope's audio sky tour makes it easy to discover the night sky. During July, the Moon makes very close brushes with Mars and Saturn.
A small asteroid slammed into the Martian surface sometime between March 27 and 28, 2012, creating a crater swarm in the ground. The largest pit is 159 feet across.
For anyone north of the equator, days are longest and nights shortest during June. But you can still get an eyeful of celestial sights, starting with a parade of Jupiter, Mars, and Saturn in the evening sky.
Dynamicists had predicted that Comet 209P/LINEAR would create an active meteor display in the early morning of May 24th. But reports from observers across the U.S. and Canada suggest that the Camelopardalid meteor shower was weak at best.
Galaxies’ central black holes are surprisingly simple creatures at heart, but they have a complicated past. New studies are starting to remove history’s obfuscating veil.
The dim, obscure periodic comet 209P/LINEAR is about to pass close by Earth — and bring with it a trail of debris that could make for an exciting meteor shower during the predawn hours of Saturday May 24th for North America.
A neighboring galaxy’s central black hole powers strong winds, allowing astronomers — for the first time — to spot those gales pushing out star-forming gas.
The Rosetta spacecraft took these images of Comet Churyumov–Gerasimenko as it approaches the nucleus. It'll launch its lander, Philae, in November onto the nucleus's surface.
Now in its 15th year, the Edgar Wilson Award recognizes comet discoveries made by amateur observers. The 2013 awards honor seven dedicated individuals who scan the skies.