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 a sun a star or a planet? While science now agrees the sun is a star, new telescopes may soon challenge how we define ...

The Sun is mostly hydrogen and helium. Its core temperature is 27 million degrees Fahrenheit. The Sun is about 4.6 billion years old. It's a G-type main-sequence star. Key takeaways sponsored by The ...

An animation posted to Twitter has shocked social media users by showing the impressive size of Jupiter and just how rapidly the solar system's largest planet rotates. The animation posted by ...

Theoretically, there is room for thousands. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The solar system contains eight planets: Mercury, ...

An analysis of the first three years of data from NASA’s Kepler mission, which already has discovered thousands of potential exoplanets, contains good news for those searching for habitable worlds ...

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 ...

University of Toulouse and University of Montreal researchers have detected two planets of sizes comparable to Earth orbiting around an old star that has just passed the red giant stage. This ...

A newly discovered warp in the outer Solar System may have been created by a small, rocky world, much closer to the Sun than ...

CAPE CANAVERAL, Fla. (AP/WISH) — For the first time ever, astronomers have discovered seven Earth-size planets orbiting a nearby star – and these new worlds could hold life. NASA made the announcement ...