Discovering planets similar to the ones in our solar system can offer clues about our past and future–which is why scientists were excited after identifying “baby Jupiter,” a younger version of the gas giant, some 100 light-years from Earth. It’s in good company.
The “chilly Earth”–some 490 light-years away–is the same size as our planet, and it orbits its parent star once every 130 days. It’s also warm enough to sustain liquid water.
Smaller than Neptune and bigger than Earth, Kepler-452b is 1,400 light-years away and may have a rocky surface.
This “dwarf planet” at the fringes of our solar system forced scientists to create a new category of tiny planets, which now includes Pluto.
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