Space Exploration

Using the Chandra X-ray Observatory, a team of scientists discovered what could very well be the first exoplanet outside the Milky Way. It's massive and might even orbit a black hole.

By Valerie Stimac

NASA's DART spacecraft hit its mark Monday, Sept. 26 after years of planning. The bullseye was asteroid Dimorphos. Here's what NASA hopes to learn now.

By Patrick J. Kiger

Surprisingly, the solar system isn't odorless - it has a distinct scent that some astronauts like and others think is stinky. So, what does it smell like and why?

By Valerie Stimac

The coldest place in the universe exists some 5,000 light-years from Earth. Do you know where it is and what it's called?

By Valerie Stimac

Kepler-186f was the first Earth-sized planet found within its star's habitable zone. But there's still a lot we don't know about it.

By Melanie Radzicki McManus

Gliese 581c was one of the first "Earth-like" planets found, back in 2007. It generated a lot of excitement then but what about now?

By Kathryn Whitbourne

Debris on Mars comes from three main sources: inactive spacecraft, discarded hardware and crashed spacecraft. What risk does this trash pose to current and future missions?

By Cagri Kilic

The two passengers might not be human, but they have a job to do. They're manning Artemis I to be zero gravity indicators.

By Kristen Hall-Geisler