Point your telescope towards these doubles — true gems of the late-summer sky. You don’t even need dark skies or a big telescope to admire them!
Use our interactive observing tool to say which of the planet's four largest moons is which.
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 information on observing Jupiter during its 2016 - 2017 apparition, including information on its moons and Great Red Spot transit predictions.
Contributing Editor Ted Forte offers a look at Hickson Compact Groups in the November 2017 issue of Sky & Telescope. In 1982, Canadian astronomer Paul Hickson published a list of 100 compact galaxy groups based on his examination of the Palomar Observatory Sky Survey (POSS) red plates. A compact group, as defined by Hickson, is…
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.
Sky & Telescope Contributing Editor Ken Hewitt gives us a guided tour through Abell 194, a visually rich galaxy cluster in Cetus.
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.
In September's astronomy podcast, you'll learn what's special about the ringed planet Saturn, now visible in the evening sky.
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.
Use this telescope calculator to tell you how changing out eyepieces and accessories will affect your telescope's performance.
The waxing gibbous Moon is appears equally distant from Saturn, well to its right, and Altair, high to its upper left.
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.
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.
The International Space Station often passes close to the Moon, Sun, and naked-eye planets. Use this tool to plan viewing these close encounters.
Look low in the west in twilight for the waxing crescent Moon. It forms a triangle with Jupiter and Spica below it.
Inspired by his love of astronomy and struck by the unique ways in which the Game Boy Camera had been harnessed, Alex Pietrow took to the internet to see what photos of space it had taken. When he found none, he took his own.
The Great American Eclipse may be over, but there are some exciting places around the globe getting ready for their own dances with darkness.
The Milky Way runs from Sagittarius in the south, up and left across Aquila and the Summer Triangle very high in the east, and down through Cassiopeia to Perseus low in the north-northeast.
Total eclipses have the power to touch us deeply and reverberate through our life in unexpected ways.
Totality watchers get the best show, but a far greater number of people will be in partial eclipse territory. Here's how to make the most of it.
If you can't resist taking pictures of the solar eclipse with your smartphone, read this first for tips to ensure quality pictures.
A total eclipse of the Sun is a spectacular sight. With a little preparation and advance planning, you can capture your own souvenir portrait of this awe-inspiring sight.
A total solar eclipse offers the most spectacular of jewels, the diamond ring, as the Moon blocks all but a small part of the Sun's brilliance.