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Tonight

Neptune at opposition to the sun this weekend
Neptune at opposition - when it's 180 degrees from the sun on the sky's dome - comes early on September 21, 2024. You'll need optical aid to spot it.
Editors of EarthSky
September 20, 2024

Astronomy Essentials

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Neptune at opposition to the sun this weekend
September 20, 2024
Visible planets and night sky guide for September
September 20, 2024
Are day and night equal on the equinox?
September 20, 2024
Equinox sun above horizon all day at the poles
September 19, 2024

Brightest Stars

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Meet Delta Scorpii, aka Dschubba, it’s a variable star
July 24, 2024
Summer Triangle star: Vega is bright and blue-white
July 19, 2024
Summer Triangle star Deneb is distant and luminous
July 12, 2024
Summer Triangle star: Altair is variable and spins fast!
July 10, 2024

Constellations

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Cassiopeia ascends in September and October
September 13, 2024
Corona Australis is the sparkling Southern Crown
September 12, 2024
Telescopium the Telescope is below the Teapot
August 29, 2024
Sagitta the Arrow lies inside the Summer Triangle
August 27, 2024

Clusters Nebulae Galaxies

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The Andromeda galaxy: All you need to know
September 5, 2024
The Great Rift is a dark swath in the Milky Way
August 28, 2024
The Wild Duck Cluster, M11, a lovely open cluster in Scutum
August 8, 2024
M6 and M7: Open star clusters in the Scorpion’s Tail
July 18, 2024

Favorite Star Patterns

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Great Square of Pegasus gallops into the autumn sky
September 10, 2024
Teapot of Sagittarius points to Milky Way center
August 23, 2024
The Northern Cross: Find the backbone of the Milky Way
July 25, 2024
Coathanger cluster: This star pattern looks like its name
July 9, 2024
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