Submarines and rovers will go for a dive on the moons of Jupiter and Saturn
Small, but mighty.
This summer, the mission may get funding to travel to a mysterious rock at the edge of the solar system
The ocean-filled moon might hold the life we've long searched for in space. And scientists have one shot to reach it.
After nine years and three billion miles, here's what we're learning from it all
It has to do with a surprisingly hazy atmosphere.
As you battle the blizzard, just be happy you don't live on Pluto
Gas might keep the dwarf planet's subsurface ocean from freezing.
How much are we really paying to explore the universe?
Could icy slush be driving the dwarf planet's geological activity?
What will we find when we reach Pluto and Ceres? We don't know, but it's going to be wild.
Another day, another hypothetical object on the outskirts of the solar system.
Scientists are hot on the trail of our solar system's 9th planet
A tour of places in our solar system where life could persevere
It's time to meet 2014 MU69.
Witness history in the making
Charon's polar cap once belonged to Pluto
What's on the horizon for the New Horizons spacecraft
From the Popular Science archives.
Bubble, bubble, toil and trouble
A look behind the scenes of NASA's advanced solar probe
This year's missions to the outer solar system are set to shake up the planetary family tree
Even though I helped demote it