The International Astronomical Union (IAU) defined a dwarf planet in 2006 as a celestial body that orbits the Sun, is round in shape, but has not cleared its orbital neighborhood of objects of ...

For a very long time, Saturn was thought to be the only planet in our solar system with rings. The rings around Saturn were discovered by an astronomer called Galileo Galilei nearly 400 years ago. He ...

Freelance writer Amanda C. Kooser covers gadgets and tech news with a twist for CNET. When not wallowing in weird gear and iPad apps for cats, she can be found tinkering with her 1956 DeSoto. Our life ...

Free to print My Little Book of Planets—a fun, free printable space mini book for kids to color, trace, and learn about planets, space vocabulary, and more! Looking for a simple and fun way to teach ...

CAPE CANAVERAL, Fla. (AP) — Talk about an Earth-shattering discovery. Scientists have spotted seven Earth-size planets around a nearby star, some or all of which could harbor water and possibly life.

Astronomers have discovered an Earth-size planet orbiting an ultracool red dwarf star similar in size to Jupiter. The red dwarf, located some 55 light-years away, is 100 times less bright than the sun ...

WASHINGTON — Space is vast, but it may not be so lonely after all: A study finds the Milky Way is teeming with billions of planets that are about the size of Earth, orbit stars just like our sun, and ...

Bigger than a planet? Smaller than an atom? Size comparison videos are all the rage and may scratch a very old itch. By Jenny Marder Not long ago, my 7-year-old son looked up from a picture he was ...

Planets this big aren't supposed to be found around red dwarfs like TOI-4860. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A massive, ...