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!"
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.
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."
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.
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.
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.
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.
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.
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.
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!