planets

Mini-Neptunes can Lose gas and Turn Into Super-Earths

Can one type of planet become another? Can a mini-Neptune lose its atmosphere and become a super-Earth? Astronomers have found…

5 months ago

Massive Rocky Planets Probably Don’t Have big Moons

The Moon has orbited Earth since the Solar System's early days. Anyone who's ever spent time at the ocean can't…

6 months ago

A Second Generation of Planets can Form Around a Dying Star

When young stars coalesce out of a cloud of molecular hydrogen, a disk of leftover material called a protoplanetary disk…

6 months ago

Astronomers Find a Planet That Orbits its Star in Just 16 HOURS!

Mercury is the speed champion in our Solar System. It orbits the Sun every 88 days, and its average speed…

8 months ago

Here are Hubble’s 2021 Photos of the Outer Solar System

If we had to rely solely on spacecraft to learn about the outer planets, we wouldn't be making great progress.…

9 months ago

In the Far Future, Stellar Flybys Will Completely Dismantle the Solar System

Consumption and disintegration. Next time you want to be the life of the party—if you're hanging out with cool nerds…

2 years ago

A Rogue Earth-Mass Planet Has Been Discovered Freely Floating in the Milky Way Without a Star

If a solar system is a family, then some planets leave home early. Whether they want to or not. Once…

2 years ago

Check Out How Big the Planets and the Moon Will be in Our Sky Over the Next Two Years

Everything in space is moving. Galaxies collide and merge, massive clouds of gas migrate, and asteroids, comets, and rogue planets…

2 years ago

Sunrises Across the Solar System

Scientists have learned a lot about the atmospheres on various worlds in our Solar System simply from planetary sunrises or…

2 years ago

The Strange, Misshapen Orbits of Planet-Forming Disks in a Triple-Star System

Whatever we grow up with, we think of as normal. Our single solitary yellow star seems normal to us, with…

2 years ago