Enjoying EarthSky? Subscribe.

270,103 subscribers and counting ...

Eleanor Imster

Watch ISS spacewalk October 20

Friday’s is the last of 3 spacewalks by International Space Station astronauts this month.

Whales and dolphins live ‘human-like’ lives

They work together, talk to each other and use tools. A new study links the complexity of Cetacean culture and behavior to the size of their brains.

Traveling to Mars? Top 6 health challenges

NASA aims to have humans on Mars by the 2030s. The people making the long space journey will experience health risks they’ve never faced before.

Creatures raft across Pacific, thanks to tsunami

Hundreds of species hitched a ride on debris from the 2011 Japanese tsunami for a 4,400-mile journey across the Pacific Ocean.

Chasing the northern lights in Alberta

A night sky timelapse by Jack Fusco featuring frozen lakes, fog inversions, and of course the northern lights!

Tropical volcanoes trigger El Niños, says study

A new study shows how large volcanic eruptions cool tropical Africa, spawning El Niño events.

Juno sees Jupiter and 2 large moons

Jupiter and 2 of its largest moons – Io and Europa – captured by the Juno spacecraft as it performed its 8th flyby of the planet on September 1, 2017.

Help identify Earth features in astronaut photos

Hey citizen scientists! You’re invited to test a new tool to study Earth using photos taken by International Space Station astronauts. Here’s how.

Today in science: 1st planet orbiting a sunlike star

On October 6, 1995, astronomers announced 51 Pegasi b, a planet about half the mass of Jupiter, orbiting a star not unlike our sun.

Anticrepuscular rays at Georgia moonrise

Scott Kuhn captured anticrepuscular rays as the moon was rising over Fort Mountain in northern Georgia.