Enjoying EarthSky? Subscribe.

263,598 subscribers and counting ...

TESS planet hunter on its way

“It’s the beginning of a new era of exoplanet research.”

What is an exoplanet?

Humans have been speculating about their existence for thousands of years, but ours is the 1st generation to know, with certainty, that exoplanets are really out there.

See it! Moon sweeps past Venus

Wonderful photos from the EarthSky community of the moon’s sweep this week past the brightest planet, Venus.

New study suggests violent origin for Mars’ moons

It was thought Mars’ 2 small moons – Phobos and Deimos – might be captured asteroids. But new work suggests an impact between primitive Mars and a dwarf-planet-sized object, resulting in the moons’ birth.

More From Latest

Was another civilization on Earth before humans?

How do we know earlier industrial civilizations on Earth didn’t rise and fall long before humans appeared? That’s the question posed in a new scientific thought experiment.

March 2018 in top 6 warmest on record

Last month wasn’t as hot as March 2016 or March 2017, but it’s in the warmest 6 since modern record-keeping began in 1880.

Green moon on April 20, 2018? Nah

For weeks, people have searched for this post more than any other at EarthSky. No, there won’t be a green moon on April 20, 2018. It’s a joke, y’all, with its roots (ahem) in cannabis culture. :-)

The search for the sun’s lost siblings

Our sun’s sibling stars could be scattered across the sky. Astronomers are sifting through newly released data in the GALAH Survey – a galactic archaeology survey – hoping to find them.

Underwater noise pollution stresses aquatic animals

The roar of motors, ping of military sonar, bangs and blasts from offshore development are distracting, confusing, and even killing, aquatic animals.

Scientists seeking continuous gravitational waves

Scientists 1st observed gravitational waves from merging black holes. Now they’re targeting a different gravitational wave signal: a long continuous waveform from a rapidly spinning neutron star.

Asteroid buzzed Earth this weekend

2018 GE3 swept by at half the moon’s distance Sunday, just hours after being detected. Its size is 3 to 6 times that of the space rock that penetrated the skies over Chelyabinsk, Russia, in 2013.

The Lyrid meteor shower is starting

You might see some Lyrids this week. April 22 is the peak morning. Try April 21 and 23 as well. Good news … the moon is out of the way.

Impossibly starry skies over NYC

This week is International Dark Sky Week. Celebrate by watching this impossible, but magical, video of dark, starry skies over light-polluted New York City. It’s new from Project Skyglow.