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Constellations
Meet Sextans, the constellation of the sextant
Sextans the Sextant is in a dim patch of sky between Leo and Hydra that is home to some interesting galaxies, and one of the largest supermassive black holes.
April 16, 2024
Astronomy Essentials
Tonight
Visible planets and night sky guide for April
Visible planets and star guide for April 2024. See a 1-minute video preview of moon phases for the month of April, linked here.
Brightest Stars
Sun
Sun news April 16: Now we’re talkin’! 4 more M flares!
April 16, 2024, sun news. Four M flares have brought sun activity to moderate. The sun definitely appears to have woken up from last week's long nap.
April 16, 2024
Space
Large asteroid safely passed Earth: See pic here!
Check out the image of the large asteroid 2013 NK4 - which is about 2,000 feet (610 meters) wide - that safely passed Earth on April 15, 2024.
April 15, 2024
Space
Did this Mars rock once lie along an ancient lakeshore?
NASA's Perseverance rover sampled an unusual Mars rock called Bunsen Peak. It is rich in carbonate and silica and likely came from an ancient lakeshore beach.
April 15, 2024
Space
3 young planetary systems revealed by Webb telescope
NASA's Webb space telescope looked for baby planets in the protoplanetary disks in 3 young planetary systems. It didn't find any, and scientists explain why.
April 15, 2024
Today's Image
Total solar eclipse pics and video from the EarthSky community
Check out these wonderful total solar eclipse pics and video from our EarthSky community! See our editor's picks that capture the partial and total phases.
April 14, 2024
Earth
Death Valley is in bloom, temporary lake still there
The heavy rains in Death Valley National Park over the past 6 months created a temporary lake and now a profusion of wildflowers.
April 14, 2024
Space
Enceladus hosting cell-sized particles, a hint of life?
A new study of Cassini data has revealed bacteria-sized particles in the plumes of Saturn's ocean moon Enceladus. Could they be evidence of microbial life?
April 14, 2024
Tonight
Use the Big Dipper to find the Little Dipper
Polaris marks the end of the handle of the Little Dipper. The 2 outer stars in the bowl of the Big Dipper point to Polaris and help you find the Little Dipper.
April 14, 2024
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