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Tonight Brightest Stars Astronomy Essentials Moon Phases Clusters Nebulae Galaxies Favorite Star Patterns Constellations
Astronomy Essentials
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Visible planets and night sky guide for May
Marcy Curran
May 13, 2026
Brightest Stars
Polaris is the present-day North Star of Earth
Bruce McClure
May 12, 2026
Constellations
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How to see the Northern Crown (Corona Borealis)
Deborah Byrd
May 10, 2026
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See it! Monday night’s moon and Jupiter

Deborah Byrd
March 22, 2016
 min read

Holy halo

Deborah Byrd
March 20, 2016
 min read

Star party in Nicaragua

Deborah Byrd
March 19, 2016
 min read

Site of collision of 4 galaxy clusters

Deborah Byrd
March 18, 2016
 min read

Galaxies

Deborah Byrd
March 16, 2016
 min read

Iridescent Kelvin Helmholtz clouds

Peter Lowenstein
March 15, 2016
 min read

Northern lights reflections, in Maine

Deborah Byrd
March 11, 2016
 min read

See Earth in Mars’ night sky

Editors of EarthSky
March 10, 2016
 min read

What eclipse-watching looks like

Deborah Byrd
March 8, 2016
 min read

Catching Venus

Deborah Byrd
March 5, 2016
 min read
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