Breaking down the Mauna Kea controversy.
Lunar exploration started as an adventure, now prospectors also see dollar signs in that smiling cheese.
What is going on with my moon?
Excerpt: A Book of the Moon
Earth isn't flat, but this strange world might be.
"Seeing color in a nebula from a garden in San Francisco? That's pretty cool."
Confirming hints picked up by the Hubble just a few years ago.
With an icy heart.
I is for interstellar.
There's still more to explore after Pluto.
Not quite ready for takeoff
New Horizons will soon find out what's up with MU69.
The spectacular scope launches in 2019.
James Webb is now slated for a 2021 launch—only a bajillion years late.
Divest from Russia, with love
Which one will win? We'll find out in 2019.
New high-res images from New Horizons reveal a very blobby space rock.
But we won't know where it's going until the government shutdown ends.
The Great Lakes are mighty chilly.
The journey to Mars, told in GIFs
Europa, the outer solar system, and a lot of questions.
Like, can we even do that?
The James Webb Space Telescope has an ever-expanding timeline—and projected cost.
NASA announced the nine astronauts selected for its Commercial Crew program.