MIT develops new technique for measuring mass of exoplanets

A team of MIT researchers has described a new method for finding the mass of exoplanets by studying the spectra of light passing through the planet’s atmosphere. Because a planet’s mass can tell us a lot about its potential for harboring life, this development could provide an important tool in solving the puzzle of whether or not we’re alone in the universe.

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A team of MIT researchers has described a new method for finding the mass of exoplanets by studying the spectra of light passing through the planet’s atmosphere.
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These are local planets, well 2 only, I presume.

How many others just happen to be in our direct line of sight…