SUNSET: 
Track Triton, Neptune's Largest Moon
Triton, Neptune's largest moon, is a tricky find. Our Triton Tracker observing tool can help users of moderate to large telescopes spot this distant moon.
Telescope Calculator: How Does Your Telescope Perform?
Use this telescope calculator to tell you how changing out eyepieces and accessories will affect your telescope's performance.
Mars Profiler: Which Side Is Visible?
To compare what you see on Mars with a map, you need to know which side of the planet you're looking at. Our handy Mars Profiler tells you that and more, for any date and time.
Asteroid Florence Pays Earth a Visit
Florence, one of the largest Earth-approaching asteroids, gets close enough to see in a small telescope this week and next. Here's how to find it.
Satellite Tracking Tool: Track the ISS & Hubble
The International Space Station passes over virtually all of Earth's populated areas, and you can spot it easily with your eyes alone — if you know where and when to look for it.
Satellite Transit Tool: Spot ISS Transits of the Sun and Moon
The International Space Station often passes close to the Moon, Sun, and naked-eye planets. Use this tool to plan viewing these close encounters.
DIY: Astronomy Projects & Guidance
A Compact, Lightweight Solar Projection Viewer
Learn how to make a travel-friendly solar projection viewer for your telescope for the next total solar eclipse!
AAS's Advice for Safe Solar-Eclipse Viewing
Due to alarming reports of potentially unsafe eclipse viewers as eclipse day approaches, the American Astronomical Society has revised its safety advice.
Low-Tech Eclipse Viewing
What to do if you're caught without optics on eclipse day. Low-tech eclipse viewing options from pinhole to binocular projection.
See the Celestial Birds of the Milky Way
Summer is perfect for bird-watching whether that be in the trees or among the stars of the Milky Way. We explore the celestial birds of the season.
New Satellite "Mayak" Might Light Up the Sky
Russia's first crowd-funded satellite, named Mayak (Russian for "beacon of light"), promises to be the “brightest object in the night sky next to the Moon.”
Explore the Night with Bob King
Bah, Humboldt! Visiting a Fringe Crater
Meet Humboldt, a magnificent lunar crater compromised by its life on the edge.
Fun in the Sun: A White-Light Guide to Our Nearest Star
We examine the fascinating solar phenomena that anyone with a small scope and safe solar filter can see, whether the Sun's in eclipse or not.
Bright Supernova Discovered in "Fireworks Galaxy" NGC 6946
A brand new supernova in NGC 6946 is bright enough to see in modest-sized telescopes. Here's how to find it.
Are You Ready, Willing, and Abell?
A cosmic rabbit hole in the tail of Leo will take you to Abell 1367, a wonderland of galaxies more than 300 million light-years from Earth. Step in and lose yourself in the vastness.
See a Potentially Hazardous Asteroid From Your Backyard
Get ready for 2014 JO25, the biggest asteroid to fly this close to Earth since 2004. Good news — even a 3-inch telescope will show it! Update: See below for a radar image and animation of 2014 JO25 captured by NASA's Goldstone Solar System Radar on April 18, 2017. Every week, a…
Comet Lovejoy Brightens Quickly, Heads North
Terry Lovejoy's new comet has gone from faint to bright in just three weeks and is now a tempting binocular target at dawn.
Explore the Night with Bob King
Pushing Limits: A Spring Sky Double Star Romp
Push your telescope to the limit and put your eyes to the test with this series of tight-knit springtime double stars.
Green Comet 45P Makes Close Earth Flyby
Green-glowing 45P/Honda-Mrkos-Pajdusakova will make an unusually close pass by Earth on Saturday. Watch it boogie across the morning sky this week!
Get Your Iridium Fix Before It's Too Late!
The shock and dazzle of Iridium flares will soon be a thing of the past. Here's how to make the most of seeing them before they're replaced by a new generation of satellites.
