On Tuesday, astronomers using NASA's Kepler space telescope announced the discovery of two Earth-size worlds orbiting a star 1,000 light-years away.
Kepler has detected many more candidate worlds of this size, but this was the first time confirmation of small rocky worlds with terrestrial dimensions had been announced.
Does this mean Kepler's mission has been accomplished? Is this proof that Earth 2.0 exists? It is after all Kepler's prime objective to seek out Earth-like worlds -- or "Earth analogs." Isn't this exoplanetary duo "Earth-like"?
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