Scientists have discovered over 4,000 exoplanets outside of our Solar System, according to NASA’s Exoplanet Archive. Some of these planets orbit multiple stars at the same time. Certain planets are so ...

In a new study, a team of astrophysicists, including two researchers at CU Boulder, have discovered a small and rocky world orbiting a star far from Earth—similar to our own planet, perhaps, but much ...

As elementary schoolers, we learned the order of the planets. Maybe your teacher even had a snappy mnemonic like "My Very Educated Mother Just Served Us Nine Pizzas" or "My Very Educated Mother Just ...

Is our Milky Way galaxy home to other planets the size of Earth? Are Earth-sized planets common or rare? NASA scientists seeking answers to those questions recently revealed their discovery. “We went ...

The Solar System is home to a remarkable range of planets, from tiny rocky worlds to massive gas giants. But just how big are these planets really? To put it into perspective, we can run some ...

Five years ago, astronomers revealed a spectacular collection of other worlds: the TRAPPIST-1 system. Newspapers around the world printed the discovery on their front pages: Astronomers had found that ...

Planets closer to their stars are easier to find because they transit more frequently. As more data are gathered, planets in larger orbits will be detected. In particular, Kepler’s extended mission ...

Two teams of astronomers have announced the discovery of a new class of planets orbiting distant stars, bringing scientists one step closer to finding Earthlike bodies that may harbor life. The teams, ...

How does a planet’s size influence its orbit around its parent star? This is what a recent study published in the Proceedings of the National Academy of Sciences hopes to address as a team of ...

Artist's rendition of Mars with Earth-like surface water. We have a fleet of robots seeking out habitability on Mars, but is the planet too small for life in the first place? A new study suggests that ...