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What is the Big Bang?

In the view of modern cosmologists, the Big Bang is the event that marked the birth of our universe. What was it - when was it - and what are modern theories?

Andy Briggs

January 1, 2025

Comets are icy balls of gas, dust and rock

Comets are diffuse balls of ice and dust orbiting the sun. They're sometimes visible in our skies. A comet's tail can stretch millions of miles across space.

Editors of EarthSky

November 28, 2024

Annular solar eclipse today! See a ring of fire

Today, an annular solar eclipse will cross over parts of South America, the Pacific Ocean, the Atlantic Ocean, and Antarctica. Watch a livestream here.

Editors of EarthSky

October 2, 2024

Partial lunar eclipse September 17-18, 2024

A shallow partial lunar eclipse takes place on September 17-18, 2024. It's visible in most of the Western Hemisphere. Maps and details here.

Marcy Curran

September 17, 2024

Extreme weather: We haven’t seen the worst yet

Earth's climate is now changing so rapidly that traditional meteorological forecasting models are failing to predict extreme weather.

EarthSky Voices

August 6, 2024

Want to find the Andromeda galaxy? Here are 2 ways

Find the Andromeda galaxy on dark, moonless skies from now until the beginning of northern spring. Here are 2 ways to find it.

Deborah Byrd

August 2, 2024

Why does the moon seem to follow me when I’m in a car?

Here's something you - or your kids - might have noticed: When you're in a moving car, earthly objects get left behind, but the moon seems to follow. Why?

Deborah Byrd

April 19, 2024

When is the next total solar eclipse? Find out here!

When is the next total solar eclipse? If the April 8, 2024, total solar eclipse gave you the bug for eclipse-chasing, you'll want to know: Find out here!

Kelly Kizer Whitt

April 9, 2024