SUNSET: 
Fishing for Double Stars in Pisces
Pisces, that sprawling constellation of faint stars easy to ignore, holds a treasure trove of double stars for small telescopes.
November Occultations of Aldebaran & Regulus
The Moon occults two 1st-magnitude stars for much of North America just six days apart. The first event happens mostly in early-evening darkness, the second in broad daylight — an extra challenge for the adventurous.
How to See and Photograph Geosynchronous Satellites
Dozens of satellites are busy day and night, beaming your favorite TV and radio programs from more than 35,000 miles away. Here's how to tune into them.
Find the Phase of the Moon
Learn the phase of the Moon tonight, the day you were born, or on any historical date.
Find Jupiter's Moons - Interactive Observing Tool
Use our interactive observing tool to say which of the planet's four largest moons is which.
Transit Times of Jupiter's Great Red Spot
Calculate when the Great Red Spot will cross Jupiter's central meridian — that's the best time to see the famous storm through your telescope.
Find Saturn's Moons: Interactive Observing Tool and App
With help from our interactive JavaScript utility, you can always tell which of Saturn's brightest moons is which.
The Elusive Moons of Uranus
Take the observing challenge: Find as many as five of the brightest moons of Uranus in a large backyard telescope using our interactive observing tool.
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.
Solar Eclipse Activities for Kids and Families
Enrich the eclipse experience — especially the long, partial phases — with solar eclipse activities for the young and young at heart.
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.”
