Use the moon to find Jupiter and Saturn in late May and early June

In late May and early June 2021, use the moon to find Jupiter and Saturn.

Photos! The close Mercury-Venus conjunction

Closest Mercury-Venus conjunction until 2033 It hasn’t been easy, but members of the EarthSky community have caught photos of the...

Why is the sun’s atmosphere hotter than its surface?

The sun's atmosphere, or corona - the wispy part we see during solar eclipses - is hundreds of times hotter than the sun's visible surface, or photosphere. Why?

‘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.

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.

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?

In late May, closest Mercury-Venus conjunction until 2033

Late May 2021 showcases the closest coupling of Mercury and Venus for years to come.

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.

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.

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!