Planets
Marsquakes are Caused by Shifting Magma
Before the InSight Lander arrived on Mars, scientists could only estimate what the planet's internal structure might be. Its size,…
Astronomers See the Wreckage Where Planets Crashed Into Each Other in a Distant Star System
Our Solar System was born in chaos. Collisions shaped and built the Earth and the other planets, and even delivered…
There are Deposits of ice at Mercury's Poles too
Ice was discovered on Mercury's poles thanks to planetary radar.
Why are Neptune and Uranus Different Colors?
New research reveals why Uranus and Neptune are different shades of blue.
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…
Astronomy Jargon 101: Albedo
In this series we are exploring the weird and wonderful world of astronomy jargon! You’ll be dazzled by today's topic: albedo!…
TESS Finds a New Mars-Sized Planet (With the Density of Mercury)
Some planets orbit their stars so closely that they have extremely high surface temperatures and extremely rapid orbits. Most of…
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.…
Astronomers Might Have Found a Planet in Another Galaxy
Not that long ago,, astronomers weren't sure that exoplanets even existed. Now we know that there are thousands of them…
Moons are Planets too
If we define planets as worlds that are geologically complex, then some moons are planets too.