Solar System
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…
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…
Jupiter Probably Has 600 Small, Irregular Moons
The better our technologies get, the better we get at finding objects in space. That's certainly true of Jupiter and…
This is What the Solar System Really Looks Like
At first glance, it looks like something from an alien autopsy. A strange organ cut from a xenomorph's thorax, under…
A Group of Meteorites All Came From a Destroyed Planetesimal With a Magnetic Core
Before our Solar System had planets, it had planetesimals. Scientists think that most of the meteorites that have struck Earth…
If Planet 9 is a Primordial Black Hole, We Might Be Able to See Flares When it Consumes Comets
A comet-eating black hole the size of a planet? It's possible. And if there's one out there in the distant…
Pluto and Other Kuiper Belt Objects Started Out With Water Oceans, and Have Been Slowly Freezing Solid for Billions of Years
It seems unlikely that an ocean could persist on a world that never gets closer than 30 astronomical units from…
NASA Thinks it’s Time to Return to Neptune With its Trident Mission
Is it time to head back to Neptune and its moon Triton? It might be. After all, we have some…
New Pictures of Phobos, Seen in the Infrared
NASA's Mars Odyssey Orbiter doesn't get a lot of headlines lately. It was sent to Mars in 2001, to detect…
Titan is Drifting Away from Saturn Surprisingly Quickly
Where did Saturn's bizarro-moon Titan form? Did it form where it is now, or has it migrated? We have decades…