4.5 Billion Earth-Like Planets Discovered in the Milky Way Galaxy
Description:The Universe is big and it's unlikely that ours is the only habitable planet. A new study suggests that billions of alien planets, similar in size to Earth, are in our own Milky Way galaxy. Researchers have concluded that 6 percent of the galaxy’s red dwarf stars could host orbiting planets roughly the size of Earth. These planets could lie within their stars' habitable zone.(1:13)