Enjoying EarthSky? Subscribe.

126,197 subscribers and counting ...


A galaxy about 43 million light years from Earth with an actively growing black hole at its center.
Science Wire | Nov 29, 2014

Using supermassive black holes to measure cosmic distances

“Eye of Sauron” is a nickname for an active supermassive black hole at the core of a distant galaxy. Researchers measured its distance at 62 million light-years.

Science Wire | Nov 28, 2014

Video: Astrophysicists discuss the film Interstellar

Black holes, worm holes, exoplanets, time dilation. Three astrophysicists discuss them all in a presentation of the science behind the film Interstellar.

Science Wire | Nov 28, 2014

Earth has its own Star-Trek-like invisible shield

Scientists studying Earth’s Van Allen belts have found an invisible shield that blocks ultrafast electrons from moving deeper into Earth’s atmosphere.

Science Wire | Nov 28, 2014

Animation shows Venus in evening sky late 2014 and 2015

Watch 238 days of the sky’s brightest planet, Venus, coming to your evening sky soon. You can also see Mercury, Mars and Jupiter enter the scene at various points.

Screen Shot 2014-11-25 at 2.03.40 PM
Science Wire | Nov 26, 2014

Video: Young volcanos on the moon

Scientists have long thought the moon’s volcanos stopped erupting a billion years ago. But dotting the lunar landscape are some remarkably fresh volcanic features.

Meteor seen during 2013 Eta Aquarid shower by Justin Ng
Tonight | Nov 23, 2014

EarthSky’s meteor shower guide for 2014

2014 Geminid meteor shower will feature a last quarter moon. Some bright Geminids will withstand moonlight! Evenings December 12 and 13. Mornings December 13 and 14.

View larger. | Time line of the universe via NASA/WMAP Science Team
Science Wire | Nov 22, 2014

Study says gravity and Higgs boson interacted to save the universe

One second after the Big Bang, the Higgs boson should have caused a Big Crunch, collapsing the universe to nothing. But gravity saved the day.

The "Dumbbell Nebula"
Blogs | Nov 22, 2014

Ten things you might not know about space

Ten oddities and misconceptions about space that you may — or may not — have heard before.

Artist's concept via ESA–C. Carreau/ATG medialab.
Science Wire | Nov 21, 2014

Thud of Philae landing on comet

Take 2 seconds to listen to a sound made 311 million miles away.

Science Wire | Nov 21, 2014

What makes a halo around the sun or moon?

A ring or circle of light around the sun or moon is called a halo by scientists.