Exoplanet
An exoplanet is a planet outside of the solar system. There could be millions of exoplanets in the Milky Way. There could be billions of exoplanets in the Universe.
Lithium important...
An exoplanet is a planet outside of the solar system. There could be millions of exoplanets in the Milky Way. There could be billions of exoplanets in the Universe.
Lithium important...