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Limb darkening is an optical effect on the sun
Limb darkening is an effect we can see on the sun where the edges of the sun are darker than the center, due to the amount of photosphere we're looking at.
August 1, 2022
Freshwater plesiosaur fossils spark Loch Ness Monster questions
Scientists have discovered the 1st freshwater plesiosaur fossils, in an ancient riverbed in Morocco.
August 1, 2022
Launches and spaceflight updates: Week of August 1, 2022
Launches updates for the week of August 1, 2022: South Korea launches its first moon mission, Elon Musk hints at a date for Starship, and more.
August 1, 2022
Visualize the Perseid meteor stream in space
This visualization by Ian Webster and Peter Jenniskens uses NASA data to render the Perseid meteor stream in space. Don't miss this!
August 1, 2022
Observer’s challenge: Moon points to Mercury August 1, 2 and 3
A night sky challenge for the Northern Hemisphere: The waxing crescent moon points to Mercury on August 1, 2 and 3, 2022.
July 31, 2022
Weird ocean holes are an unsolved mystery
Scientists with NOAA Ocean Exploration say they found weird ocean holes on the Atlantic seafloor while exploring an underwater volcano. What made them?
July 30, 2022
Garbage in our oceans: How best to remove it?
Some groups are trying to clean up garbage patches in the oceans while others are trying to stop the plastics from entering the oceans in the first place.
July 30, 2022
July’s deep sky for 2022: A wealth of summer nebulae
Members of the EarthSky community shared these amazing photos of July's deep sky. See nebulae from Cygnus, galaxies and more!
July 30, 2022
Enceladus’ ocean not too salty for life
A new study shows that the subsurface ocean on Enceladus is less salty than oceans on Earth. This bolsters the chances of Enceladus' ocean supporting life.
July 29, 2022
Uranus and Mars conjunction on July 30 and 31
Use Mars to spot the elusive 7th planet, Uranus. A pair of binoculars will help you see the faint outer planet on the mornings of July 30 and 31, 2022.
July 29, 2022
