Scientists directly imaged two embryonic exoplanets 370 light-years away.
And it could help prove the existence of Planet Nine.
It could be the largest moon we've ever seen
From the Popular Science archives.
Shower your friends with meteor facts.
Is there a planet—or even planets—waiting to be discovered out there?
As black as day.
A gallery of photos, visualizations, and other pictures of outer space.
NASA's mission to Jupiter is brought to you by: the Sun, from 500 million miles away
Juno will zoom in on Jupiter on July 4th
This summer we'll get our closest ever look at the stormiest planet in the solar system
Getting too much suns
Sometimes you just need a rocket that flies at 2 million miles per hour
The evidence is right in front of you.
Planet 2MASS J2126-8140 orbits a trillion kilometers out from its sun
Scientists are hot on the trail of our solar system's 9th planet
The Dawn spacecraft has just moved in for a closer look at the dwarf planet
Fortunately it's not headed for Earth
New Horizons scientist Leslie Young discusses what to expect from the flyby on Tuesday, and the 28-year wait leading up to it
And he thinks the upcoming flyby will prove it
Blame it on the dark side
This year's missions to the outer solar system are set to shake up the planetary family tree
From 283,000 miles out, the spacecraft is already making discoveries
Rosetta is on a journey to unlock the history of the solar system.