Enjoying EarthSky? Subscribe.

267,826 subscribers and counting ...

Astronomers chart galaxy orbits in our Local Supercluster

“For the first time, we are not only visualizing the detailed structure of our Local Supercluster of galaxies, but we are also seeing how the structure developed over the history of the universe.”

All the illions from Cosmos, in order

Why? Because we love Carl Sagan.

Turning hurricanes into music

A meteorologist and a music technologist are turning data from tropical storms into musical graphs. Can listening to storms help us understand them better?

What would Earth be like with no moon?

Earth without its moon would be a very different world indeed. No eclipses. Smaller tides. But the biggest change would be in the length of Earth’s day.

Supermassive black holes photobomb Andromeda galaxy

Astronomers thought J0045+41 was 2 orbiting stars, part of the nearby Andromeda galaxy. New work shows it’s 1,000 times more distant, possibly the most tightly coupled pair of supermassive black holes yet seen.

Do songbirds share ‘universal grammar’?

A new study suggests that humans and songbirds have common biological hardwiring that shapes how they produce and perceive sounds.

Pulsars were discovered 50 years ago

In 1967, while helping analyze data from a new telescope, Cambridge student Jocelyn Bell observed a bit of “scruff” – the first evidence of a pulsar. The discovery changed our view of the universe.

Watch: Incredible hurricane visualization

Take 2 minutes to watch this stunning NASA timelapse showing sea salt, dust, and smoke flowing around Earth during 2017’s active hurricane season.

It’s the 1st known interstellar asteroid

It swept nearest the sun in September, then sped away again, back to interstellar space. Astronomers named it `Oumuamua. It’s dark red, very elongated and unlike anything in our solar system.

Help astrobiologist find extreme rocks

A scientist launches a hunt for earthly extraterrestrials. Help her find them!