Alien Earths may be plentiful in our Milky Way galaxy

Alien Earths may be plentiful in our Milky Way galaxy

An artist’s conception of a newly formed star surrounded by a swirling protoplanetary disk of dust and gas, where debris coalesces to create rocky ‘planetesimals’ that collide and grow to eventually form planets. A new study suggests small rocky planet may actually be widespread in our Milky Way galaxy.

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