Astrophysicists’ update on enormous and unexpected Fermi bubbles

Discovered in 2010, two vast and mysterious Fermi bubbles radiate out from our Milky Way galaxy's core. An update from the three astrophysicists who found them.

Huge distant planet has rings 200 times larger than Saturn’s

It's a super Saturn, 434 light-years from Earth. It has more than 30 rings, with a total diameter of some 120 million kilometers. If we could replace Saturn’s rings with these rings, they’d be easily visible from Earth and larger in our sky than a full moon.

Stunning panorama from Opportunity rover on Mars marks 11th year

A panoramic view of the desert world next door, from one of the highest elevations reached by the Mars rover Opportunity in its 11 years on the Red Planet.

Asteroid that flew past Earth on Monday has a moon!

Radar images of asteroid 2004 BL86 confirm the primary asteroid is 1,100 feet (325 meters) across with a small moon 230 feet (70 meters) across.

Big asteroid swept close on January 26

Asteroid 2004 BL86 came closer than any known asteroid this large until 2027. Information and photos of the asteroid, plus links to more.

The intriguing crack in Rosetta’s comet, and more

Scientists publish a slew of science results from the Rosetta comet mission. Among the most fascinating ... a crack in the comet's neck! Plus dust and jets, the mysterious double-lobed shape, and more.

Seasons are changing on Rosetta’s comet

Two photos from the Rosetta spacecraft – one from last November, and one from a few days ago – show a comet’s seasons changing.

Is our Milky Way a wormhole?

In theory, our home galaxy Milky Way could be a wormhole - a galactic transport system - says a team of astrophysicists.

Friday night’s rare triple shadow transit of Jupiter

Three moon shadows at once on Jupiter Friday night! It won't happen again for U.S. observers until the year 2032. You can also watch online.

Venus vortex!

This ghostly puff of smoke is actually a huge mass of swirling gas and cloud at planet Venus’ south pole, as seen by ESA’s Venus Express spacecraft.

2026 Donation Campaign

If EarthSky has ever helped you discover something new, prepare for an eclipse, spot a planet, or simply inspired a moment of wonder, today is the perfect day to give back. Your donation helps keep trusted science news, expert night sky guides, and independent science journalism free for everyone.

Please help keep EarthSky going by donating today!

Please help keep

EarthSky going!

If you've already donated, we apologize for the popup and greatly appreciate your support.