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Moon with Aldebaran and Pleiades, Oct. 22-23, 2021

This Week's Sky At a Glance

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

As fall proceeds, Jupiter and Saturn shift westward and tilt ever more steeply. Venus gets a little higher and brighter. The waning Moon passes the Pleiades. And as Halloween approaches, Arcturus becomes the Ghost of Summer Suns.

Jupiter impact flash Oct. 15, 2021

Explore the Night with Bob King

Jupiter Whacked Again? Japanese Astronomers Record Possible Impact

A group of Japanese astronomers just discovered a potential new impact at the planet Jupiter.

International Observe the Moon Night 2021

People, Places, and Events

International Observe the Moon Night 2021

Join fellow lunar enthusiasts all over the world in celebrating the Moon this weekend.

Moon shines with Jupiter and Saturn, Oct. 15, 2021

Celestial News & Events

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

The gibbous Moon shines under Jupiter and Saturn, then waxes to full under the Great Square of Pegasus. Cassiopeia stands on end high in the northeast, as Capella glitters far below.

Comets

How Bright Will Comet Leonard Get?

We examine circumstances and expectations for the current apparition of Comet Leonard, which may become the year's brightest comet.

Moon, Venus, Antares at dusk, Oct. 9-10, 2021

This Week's Sky At a Glance

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

The crescent Moon returns to the evening sky, passing Venus, then the Saturn and Jupiter pair. Venus itself passes Delta Sco and then Antares. Auroras may shimmer, the Draconids may sputter; the sky never ceases to call.

Moon-Venus Oct 9-10 2021

Sky Tour Astronomy Podcast

October: Three Planets at Dusk

Take advantage of October's crisp, clear evenings and early-arriving dawns to explore the nighttime sky with our audio guided tour.

Waning Moon passing Regulus at dawn, Oct. 2-3, 2021

This Week's Sky At a Glance

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

Venus shines in twilight; watch Antares and the head of Scorpius slide toward it. Check out Jupiter, and hop from Saturn to two binocular double stars. The evenings are dark for deep-sky observing; the waning Moon crosses Leo before dawn.

Conflagration, Expansion and Fade

Explore the Night with Bob King

Comet 29P Undergoes Brightest Outburst in Recent Years

Catch one of the most active small bodies in the solar system during a rare superoutburst.

Cassiopeia open clusters map

Explore the Night with Bob King

Cassiopeia Cornucopia — Pretty Little Clusters All in a Row

See nine unique open clusters in Cassiopeia while barely moving your telescope.

Jupiter and Saturn in Capricornus, late Sept. 2021

Celestial News & Events

This Week's Sky at a Glance, Sept. 24 – Oct. 2

Jupiter and Saturn shine in the south-southeast at dusk, Venus low in the southwest. They're all close to the ecliptic, so a straight line from Jupiter through Saturn points almost exactly to Venus. Don't believe it? Stretch a string tightly between your hands wide apart, hold it up to the three planets, and see for yourself!

M71

Night Sky Sights

The Last Wildflowers: Globular Clusters Greet Autumn

These four globular clusters are easy to find in autumn skies and a perfect way to welcome the season.

Moon under Saturn and Jupiter, Sept. 16-18, 2021

This Week's Sky At a Glance

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

The waxing gibbous Moon shines with Jupiter and Saturn on its way to full. And as summer turns to fall, Deneb replaces Vega as the zenith star after dusk.

Possible Jovian impact flash

Explore the Night with Bob King

Amateurs Spot New Impact Flash at Jupiter

An amateur astronomer has discovered a possible new impact flash in Jupiter's equatorial region. Observers may yet see the dark impact scar.

This Week's Sky At a Glance

This Week's Sky at a Glance, September 10 – 18

The evening Moon steps eastward over Scorpius as it waxes through first quarter. All four giant planets await your telescope in early to late evening.

Counting stars during the pandemic

Stargazer's Corner: Adventures Under the Night Sky

The Pandemic and Light Pollution

Student Kathryn Huth set out to conduct astronomical experiments when she noticed that — amidst the pandemic — she could see more stars in the sky.

Venus and Mercury in twilight, Sept. 5, 2021

Celestial News & Events

This Week's Sky at a Glance, September 3 – 11

Spica glimmers demurely under showy Venus in the western twilight. Try for Mercury way down to their lower right. Jupiter and Saturn dominate the evening south.

Comet 4P/Faye and tail

Celestial News & Events

Making Time for Morning Comets

If you like mixing comets with the quietude of observing in the small hours, September opens with five fuzzy vagabonds just waiting for a visit.

Guide to the Summer Triangle

Sky Tour Astronomy Podcast

Summer Triangle Overhead

The calendar might say “September,” but now is the perfect time to explore the Summer Triangle. Find your way with this month’s Sky Tour podcast.

Gamma Cassiopeia

Celestial Objects to Observe

Meet Gamma Cassiopeiae, the Classic Eruptive Variable

Gamma Cassiopeia may lack a proper name, but the middle star of the "W"-shape constellation is worth finding on the sky.

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