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What is retrograde motion? And why is the moon moving backwards?
Editors of EarthSky
September 11, 2026
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Visible planets and night sky guide for September
Marcy Curran
September 11, 2026
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Deborah Byrd
September 10, 2026
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Non-native species: Should we embrace them?
Deanna Conners
July 4, 2011
min read
Expanding light bubble over Hawaii in video
Deborah Byrd
July 3, 2011
min read
Clocking Neptune’s mysterious spin
Editors of EarthSky
July 3, 2011
min read
Could you cure type 2 diabetes by flipping a switch?
Emily Willingham
July 2, 2011
min read
A snakebite ointment identified by Australians
Emily Willingham
July 1, 2011
min read
One of 2 hottest years on record was 2010
Editors of EarthSky
July 1, 2011
min read
See a twirling whale in this amazing video
Jorge Salazar
July 1, 2011
min read
Brightest quasar in early universe found
Editors of EarthSky
June 30, 2011
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Annual cost of weather may total $485 billion in U.S.
Editors of EarthSky
June 29, 2011
min read
Tropical Storm Arlene forms as clouds gather
Jorge Salazar
June 29, 2011
min read
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