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The 5 petals of Venus and its 8-year cycle

Learn about the 8-year cycle of Venus in our sky and the petals of Venus, a rhythmic motion of Venus when viewed from an Earth-centered perspective.

Guy Ottewell

January 22, 2023

The green comet: Comet 2022 E3 ZTF

Learn about the trajectory of the green comet - Comet 2022 E3 ZTF - by the renowned astronomer Guy Ottewell. The comet will be closest to Earth on February 2.

Guy Ottewell

January 17, 2023

What is a variable star?

What is a variable star? It's a star that brightens and dim in a cycle that might last hours, or weeks, or months, or longer. Astronomers know millions!

Andy Briggs

EarthSky Voices

January 15, 2023

Best of 2023: Night sky events not to miss

Best of 2023: Find the most magnificent night sky scenes that you won't want to miss, chosen for you by the editors of EarthSky. Planets, eclipses and more!

John Jardine Goss

January 1, 2023

Comet C/2017 K2 is closest to the sun Dec 19

Comet C/2017 K2 (PanSTARRS) reaches its closest point to the sun - perihelion - on December 19, 2022. It's now a target for southern skies.

Eddie Irizarry

Kelly Kizer Whitt

December 18, 2022

Total lunar eclipse on November 8, 2022

It'll be early morning in North America for the November 8, 2022, total lunar eclipse. It's visible across Asia, Australia, the Americas and the Pacific.

Fred Espenak

Editors of EarthSky

November 6, 2022

Taurid meteors in 2022: Watch for fireballs!

The 2 Taurid meteor showers are overlapping around now, making this week a great time to watch. Plus, this year, 2022, there's an extra chance to see fireballs!

Robert Lunsford

November 2, 2022