In 2006, Pluto was officially reclassified as a dwarf planet. The decision came down to one controversial rule about clearing an orbital neighborhood. As astronomers discovered more objects beyond ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. The composite image shows ...

Stargazers will be treated to a dazzling six-planet "alignment" this January. A planetary alignment, or a "planet parade" according to the internet, will grace our night sky just after dusk, according ...

Stargazers are in for a treat this week as a planetary parade is set to take place - just a month after the last planetary spectacle. This latest planetary alignment or "planet parade" - set to take ...

An artist's rendition of the eight planets in our solar system. The planets are depicted closer together than they really are. NASA / JPL Nearly two decades after Pluto got kicked out of the planet ...

If you’d like to see all the planets of our solar system, this is a good week to do so. Step outside at dusk and you’ll notice the most obvious of planets in the southwestern sky. I’m referring, of ...