5,000 exoplanets outside of our solar system have been discovered! So are we alone?
It turns out, according to NASA's archive, they're pretty common.
The discovery of exoplanets has accelerated in the past 30 years, Christiansen said, as techniques and instruments for locating them improve. To help you wrap your mind around that, JPL put together this audiovisual representation of that increasing pace of discovery:Scientists have also gotten better at debunking planets that, well, turn out not to be planets.
"When we were trying to hit the 5,000 exoplanets, I made sure we overshot a little bit and landed on 5,005 just because we knew that some planets would come [off the list] in the future," Christiansen said. Researchers now have a big enough sample size to start looking at exoplanets as a"population," Christiansen said."We can really start to ask questions about the demographics of the population," she said,"like how common different kinds of planets are and what kinds of stars make different kinds of planets.
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