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Celestial Objects to Observe

A Jupiter Almanac

Find information on observing Jupiter during its 2020 apparition, including information on its moons and Great Red Spot transit predictions.

Venus-Jupiter conjunction

Celestial Objects to Observe

How Bright Are the Planets?

What do Venus and Jupiter have in common? Revisions to planets' magnitudes in this year's Astronomical Almanac have revealed some surprises.

Night Sky Sights

Globular Clusters Await: Hello, Messier 3!

Globular cluster season is here. Time to get out your charts, binoculars, and telescopes and enjoy these wondrous objects.

This Week's Sky at a Glance logo

This Week's Sky At a Glance

This Week's Sky at a Glance, May 22 – 30

Venus is a super-thin crescent as it plunges down to the sunset horizon this week. Bring out the telescope and/or binoculars. Mercury, also in the western evening twilight, is a tiny "half Moon" with a much less intense surface brightness.

Night Sky Sights

See Spring's Finest Spiral Galaxies

Spring skies offer some of the best sights of spiral galaxies. Point your scope at some of these magnificent cosmic whirlpools.

Celestial Objects to Observe

See the Phases of Venus

If you have a set of binoculars or a telescope, watch for Venus’s thinning crescent over the next couple weeks.

This Week's Sky at a Glance logo

This Week's Sky At a Glance

This Week's Sky at a Glance, May 15 – 23

Catch Venus and Mercury in conjunction on the 21st, only 1° apart, in twilight for North America. That's about the width of a pencil held at arm's length. Think photo opportunity!

All-season Triangle

Night Sky Sights

This May, Find the Star Pattern That Spans All Seasons

Widen your view to see the All-Season Triangle asterism, whose stars span the year.

Explore the Night with Bob King

Supernovae Light Up in M61 and NGC 3643

Two new supernovae for amateur telescopes are keeping things lively this month.

Planetary nebula St-Dr-1

Stargazer's Corner: Adventures Under the Night Sky

New Nebula Discovered in Taurus

Amateurs have found and visually confirmed a planetary nebula, St-Dr-1.

This Week's Sky at a Glance logo

This Week's Sky At a Glance

This Week's Sky at a Glance, May 8 – 16

Pollux and Castor form the top of the enormous Arch of Spring. To their lower left is Procyon, the left end of the Arch. Farther to their lower right is the other end, formed by Menkalinan (Beta Aurigae) and then brilliant Capella.

Night Sky Sights

Comet SWAN Expected to Put on a Splendid Show

Comet SWAN will grace northern skies in the days to come.

Labeled Big Dipper

Learning About the Sky

The Big Dipper: Hop to Spring's Sky Sights

The Big Dipper is one of the most familiar sights in the Northern Hemisphere’s night skies. You can use its stars to locate other fun targets.

Venus & Mercury on May 21 2020

Night Sky Sights

May 2020: Venus & Mercury at Dusk

Would you like to learn your way around the night sky in just 10 minutes? This month's Sky Tour astronomy podcast helps you to navigate all across the late-spring sky like a stargazing veteran. No experience or equipment needed!

This Week's Sky at a Glance logo

This Week's Sky At a Glance

This Week's Sky at a Glance, May 1 – 9

Look high in the west for Pollux and Castor, the heads of the Gemini twins. They form the top of the enormous Arch of Spring. To their lower left is Procyon, the left end of the Arch. Farther to their lower right is brilliant Capella.

This Week's Sky at a Glance logo

This Week's Sky At a Glance

This Week's Sky at a Glance, April 24 – May 2

Astronomy is an outdoor nature hobby. For an easy-to-use constellation guide covering the whole evening sky, use the big monthly map in the center of Sky & Telescope magazine.

Asteroids

Chase a Potentially Hazardous Asteroid As It Flies by Earth

Break out your binoculars or a small telescope, we've got a busy week ahead! Watch as a bright asteroid approaches Earth, the Moon steals a star, and Comet ATLAS's last hurrah.

Big Dipper, stars labeled

Night Sky Sights

Meet Dubhe, Giant of the Big Dipper

Of the seven stars in the Big Dipper, Dubhe is an outlier. Its color, speed across the sky, and evolutionary age set it apart from its comrades.

This Week's Sky at a Glance logo

This Week's Sky At a Glance

This Week's Sky at a Glance, April 17 – 25

Venus continues to blaze in the west during and after twilight. This evening it's passing north (upper right) of Aldebaran.

Celestial Objects to Observe

New Comet Alert! Quartet of Comets Grace Our Skies

There's a lot happening in the northern sky these days, namely lots of comets! Comet ATLAS (C/2019 Y4) is still worth watching, but look for the new Comet SWAN (C/2020 F8) and Comet ATLAS (C/2019 Y1). And you can still catch a glimpse of our old friend, Comet PanSTARRS (C/2017 T2).

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