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Tonight Brightest Stars Astronomy Essentials Moon Phases Clusters Nebulae Galaxies Favorite Star Patterns Constellations
Brightest Stars
Meet Regulus, Leo the Lion’s Heart and brightest star
Larry Sessions
May 22, 2026
Astronomy Essentials
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Visible planets and night sky guide for May
Marcy Curran
May 22, 2026
Astronomy Essentials
Constellations and signs: What’s the difference?
Guy Ottewell
May 20, 2026
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What is the Anthropocene?

EarthSky Voices
January 4, 2016
 min read

After 8 years, Dawn probe brings Ceres into closest focus

EarthSky Voices
January 1, 2016
 min read

Earth ABCs from space

Eleanor Imster
January 1, 2016
 min read

Dark skies disappearing

EarthSky Voices
December 28, 2015
 min read

How big can black holes grow?

Deborah Byrd
December 24, 2015
 min read

Latest images of Christmas Eve asteroid

Eddie Irizarry
December 24, 2015
 min read

Awesome Falcon 9 landing in Florida

Deborah Byrd
December 22, 2015
 min read

Lifeform of the week: Mistletoe

Alex Reshanov
December 21, 2015
 min read

Has LHC found revolutionary new particle? Maybe.

EarthSky Voices
December 18, 2015
 min read

November 2015 warmest on record

Deborah Byrd
December 18, 2015
 min read
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