Earth's 'Bigger, Older Cousin' Maybe Doesn't Even Exist
In 2015, to great fanfare, NASA announced a planet discovery considered a milestone in the hunt for another Earth. But now some researchers say it's not clear that this planet actually exists.
Ever since astronomers started to detect planets beyond our solar system, they've been trying to find another world just like Earth. And few years ago, they announced that they'd found a planet that was the closest match yet â Kepler-452b.
Trouble is, some astronomers now say it's not possible to know for sure that this planet actually exists.
"There's new information that we can now quantify, who used to be an astronomer on the science team for NASA's Kepler Space Telescope.
