'Earth copies' can exist in the universe

Proxima b, the closest stone planet outside the solar system, is one of many places where life can exist due to many suitable conditions.

Proxima b is 4.2 light years from Earth and lies in an area that allows liquid water to exist on the surface.

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The Gliese 667 c system consists of at least one and possibly three super-Earths in the region that inhabit the star.

Kepler 186 f is 1.5 times larger than Earth, 561 light years from Earth.

The Kepler 442 b is 1115 light-years from Earth, it flies around an orange dwarf with a life of at least 30 billion years.