Major 8.2-magnitude earthquake rocks Alaska

Sirens sounded across Alaska's Kodiak island last night, after an 8.2-magnitude earthquake prompted tsunami warmings.

9 weird transients from 1950 still unexplained

Astronomers in Sweden want to solve the mystery of 9 weird transients, glimpsed in a photographic plate acquired at Palomar Observatory in 1950.

Astronomy art: Voices of Apollo 11

Voices of Apollo 11 is an image of the moon, made of the words transmitted from the moon by Apollo 11 astronauts. Astronomy artist J-P Metsavainio created it.

How to spot ISS in your sky

The International Space Station has been orbiting our planet since 1998. Click here to learn how to spot ISS in your sky.

Thank you, Eleanor Imster

Say good-bye to Eleanor Imster, a fixture at EarthSky since 1995.

The billionaire space race and the Karman line

The billionaire space race ramped up at Richard Branson's successful flight to the edge of space on July 11, 2021, as 2 spaceflight companies jostled for bragging rights.

NASA’s Mission Equity: Still time to participate

NASA's Mission Equity virtual public meeting on July 13, with the goal of including underrepresented and underserved communities.

Last chance to see Manhattanhenge in 2021

New Yorkers will have their last chance in 2021 to watch for Manhattanhenge, an alignment of the sunset along city streets. Fun!

Dragon Man may be Homo sapiens’ closest relative

Scientists determined a skull found in China is a new species named Homo longi, or Dragon Man, which is the closest relative to Homo sapiens.

What causes a highway mirage?

A highway mirage is most often seen in summer, when the roadway ahead of you might be much hotter than the air above. Here's what causes it.