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Space
Surf’s up! Waves on heartbeat star are as tall as 3 suns
Giant waves on heartbeat star MACHO 80.7443.1718 are as tall as 3 suns, astronomers say. They give a new meaning to the phrase "surf's up!"
August 18, 2023
Spaceflight
SpaceX Starlink launches for August
SpaceX’s fifth Starlink launch for the month is currently scheduled from California at 6:04 UTC on August 21, 2023. Learn more here.
August 17, 2023
Tonight
Venus to return as ‘morning star’ late August 2023
Throughout 2023, Venus was in the evening sky. People called it the "evening star." After about August 21, Venus will return as the "morning star."
August 17, 2023
Tonight
New comet C/2023 P1 Nishimura to brighten in September
A new comet, named Nishimura, may be bright enough to see with the unaided eye in September. Find out where the comet will be and how to see it.
August 17, 2023
Tonight
Moon near Mars after sunset on August 18 and 19
Look for a thin crescent moon near Mars after sunset on the evenings of August 18 and 19, 2023. The moon will pass as close as four full moon widths from Mars.
August 17, 2023
Space
The colors of Earendel, farthest known star
The Webb space telescope has looked at the colors of Earendel, the most distant known star. The new data shows that the star likely has a redder companion star.
August 17, 2023
Constellations
Aquila the Eagle soars along the Milky Way
Aquila the Eagle is home to the bright star Altair, which forms one corner in the Summer Triangle. Look for it in the evenings from July to November.
August 17, 2023
Sun
Solar Cycle 25 is more active and powerful than predicted
So far this solar cycle has been more powerful and surprising than predicted. It has been very active so far before the predicted peak in 2025.
August 16, 2023
Space
Ancient ‘honeycomb’ mud on Mars boosts chances for life
NASA's Curiosity rover has discovered ancient honeycomb-patterned mud on Mars. The now bone-dry mud is evidence of cyclic wet-dry periods in Mars' past.
August 16, 2023
Today's Image
Perseid meteor photos from around the world, 2023
See these Perseid meteor photos from EarthSky community members from around the world. Thanks to all who contributed these great photos!
August 15, 2023
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