Space Exploration

Space exploration is a broad topic covering many facets of deep-space and planetary science. Learn about space probes, Mars Rovers, SETI and other out-of-this-world subjects.

Deep in the Heart of Our Galaxy, Einstein Proved Right Again

Hints of Einstein's general relativity have been detected in a black hole "laboratory" smack in the center of the Milky Way.

Small, Alien Worlds Come in Two Flavors: Super-Earths and Mini-Neptunes

Get ready for a new branch in our galaxy's planetary family tree.

Elon Musk Lays Out Plans to Colonize Mars

Could humans really colonize Mars within the next 50 years? Elon Musk seems to think so.

NASA Welcomes Its 2017 Class of New Astronaut Recruits

NASA's newest astronauts-in-training will have to learn how to fly a jet and speak Russian. It's going to be a long two years.

Gravitational Waves Detected for a Third Time, Revealing Another Black Hole Collision

Thanks to gravitational wave observatories, we're entering a new era of astronomy, one in which the dark universe will finally be revealed.

Cosmic Rays Recreated in the Lab, With a Goal of Safer Space Missions

Researchers used laser-plasma-based accelerators to simulate the sort of radiation that astronauts and spacecraft might encounter in outer space.

Comets Are Oxygen Factories

And that actually might pose a problem when it comes to the search for life on other planets.

Turning Martian Soil Into Building Blocks for Colonists

If we're going to colonize Mars, we're going to need to figure out how to live off the land. Martian soil might be strangely suited for that task.

4 Reasons Why 'Earth-like' Gliese 1132b Isn't All That 'Earth-like'

Plus, we throw in one reason to get excited anyway.

Event Horizon Telescope Getting Historic Look at Milky Way's Black Hole

The "virtual telescope" is first getting up close and personal with Sagittarius A*, the supermassive black hole at the center of our galaxy.