The Milky Way may be swarming with planets with oceans and continents like here on Earth

The Milky Way may be swarming with planets with oceans and continents like here on Earth
Astronomers have long been looking into the vast universe in hopes of discovering alien civilisations. But for a planet to have life, liquid water must be present. The likelihood of that scenario has seemed impossible to calculate because it has been the assumption that planets like Earth got their water by chance when a large ice asteroid hit the planet.
phys.org
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