Planets have to orbit a star, be big enough to form a sphere and keep other objects out of their path around their star.
Scientists Say: Dwarf planet
Super-Earth' Discovered Among 60 New Planets That Could Support Life, Scientists Say
Scientists say this planet smells like rotten eggs
Six Planets Have Been Found Around A Bright Star, Say Scientists
Scientists Say Young Earth's Atmosphere Much Like Today's
Scientists Say: Planet
Earth currently experiencing a sixth mass extinction, according to
Ancient Mars Had an Ocean, Scientists Say - The New York Times
Planet Located 4.2 Light Years Away Is Most Likely Perfect for
Vanishing The Earths Sixth Mass Extinction|TikTok Search
Scientists say at least one in six stars has an Earth-sized planet
Welcome Back Pluto? Study Urges Scientists To Rethink The Definition Of A ' Planet'
Alien megastar more hungry than mysterious, scientists say it ate a planet, Trending
What to expect from the world's sixth mass extinction – DW – 01/11
Scientists Say: Planet