It’s official: The number of planets known beyond our solar system has just passed 5,000.
The 5,005 confirmed exoplanets can be categorized and divided into several distinct types, of which planets the size of Neptune are the most common. Super-Earths, not seen in our solar system, are a close second with Jupiter-like giant gassy planets coming in third. Small rocky worlds, some of which may resemble our own, come in fourth.Graph: E. Otwell, Data: NASA Exoplanet Archive
Astronomers can’t say much about those worlds beyond diameters, masses and densities. But several projects, like the , are working on that, Kesseli says . “Not only are we going to find tons and tons more exoplanets, but we’re also going to start to be able to actually characterize the planets,” she says., has confirmed more than 200 planets, with thousands more yet to verify, Kesseli says . Ongoing searches from ground-based telescopes keep adding to the count as well.
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