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‘Ring of fire’ solar eclipse on June 10
The moon will sweep in front of the sun June 10 to stage 2021's first solar eclipse. A bright ring, the sun's outer rim, will surround the moon at mid-eclipse.
May 30, 2021
US Pentagon UFO report due in June
The US Pentagon UFO report - an unclassified document - is due in June 2021. It's supposed to reveal everything government agencies know about UFOs.
May 28, 2021
What’s this rainbow patch in the sky?
One EarthSky reader captured a photo of a rainbow patch hanging below a cloud, looking almost like a sheet of rain. What was it?
May 28, 2021
In late May, closest Mercury-Venus conjunction until 2033
Late May 2021 showcases the closest coupling of Mercury and Venus for years to come.
May 28, 2021
How shrinking planets might explain missing planets
There's a puzzling gap in exoplanets, orbiting distant stars. Where are the worlds between 1.5 and 2 times Earth's radius? Shrinking planets may be the answer.
May 27, 2021
Meteors from rare long-period comets
With a global camera network, scientists track meteors of long-period comets - which take thousands of years to orbit once - to predict the next meteor rain.
May 27, 2021
See it! May 26, 2021, lunar eclipse photos
Enjoy a few photos of the May 21, 2021 lunar eclipse from EarthSky friends around the world. Thanks so much to all who shared your photos with us!
May 26, 2021
Thursday liftoff for 36 OneWeb internet satellites
Launch is scheduled for 1:43 p.m. EDT on May 27, 2021. It'll bring OneWeb’s fleet to 218, 2nd-largest global internet network in Earth orbit after Starlink.
May 26, 2021
Arctic sea ice succumbs to Atlantification
Satellite data reveal that warmer Atlantic waters are intruding on Arctic sea ice. The warm waters are impeding sea ice regrowth in winter.
May 26, 2021
Say hello to the world’s biggest iceberg
The world's biggest Iceberg - named A-76- cracked off of Antarctica in late May.
May 26, 2021
