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Life, the Universe and Everything (with Adam Frank)
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The Origins of the 5000 Planets
In 1905, we had technologies that were good enough to analyze the light coming from the star and actually detect that back and forth wobble. And encoded in that wobble is the mass and the radius of the planet. That's how we discovered the first planets was what we call the wobble method. But then another way of finding exoplanets was to look for basically what is the interstellar equivalent of an eclipse. When a planet passes in front of a star between us and the stars, it's going around in its orbit,. The light dims a little bit right it blocks a little bit of the star light so that the planet blocking the star light can be seen with sensitive detectors.
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