Tonight

Sun activity: Aurora alert! 4 blobs of sun coming our way

Sun activity for November 30 is low, but excitement is on the way to Earth! Four coronal mass ejections should bring auroras late tonight and tomorrow night.

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Sun activity: Aurora alert! 4 blobs of sun coming our way

Visible planets and night sky for November and December

Meteor shower guide: Up next the Geminids and the Ursids

Look for Mercury after sunset, early December 2023

2023’s most-illuminated quarter moon is December 4-5

How 3200 Phaethon may create debris triggering the Geminids

Mirfak is the brightest star in Perseus the Hero

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Astronomy Essentials

Visible planets and night sky for November and December

Thinking of buying a telescope? Read this 1st

Mars in 2023: Mars is too close to the sun to see now

Winter meteor showers are here: Top 10 tips for watching

Brightest Stars

Sun activity: Aurora alert! 4 blobs of sun coming our way

Achernar is the End of the River of Eridanus constellation

Al Risha binds the Fishes of Pisces together

Meet Hamal, an ancient equinox star

Constellations

The constellation Sculptor contains the South Galactic Pole

Tucana the Toucan is home to the Small Magellanic Cloud

Pegasus the Flying Horse, and the best sky story ever

The constellation Andromeda the Chained Lady

Clusters Nebulae Galaxies

The Local Group is our galactic neighborhood

Triangulum galaxy is 2nd-closest to Milky Way

Double Cluster in Perseus on October evenings

Do the Large and Small Magellanic Clouds need new names?

Favorite Star Patterns

The Pleiades – or 7 Sisters – known around the world

Great Square of Pegasus gallops into the autumn sky

Teapot of Sagittarius points to Milky Way center

The Scorpion’s Crown and its stellar neighborhood