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NASA's newest planet-hunting telescope is hard at work gathering its first data — but just how many planets might it hunt down?

According to new estimates put together by scientists on the team behind the Transiting Exoplanet Survey Satellite, or TESS, the instrument should identify about 10,000 planets in its two-year mission; 3,500 of them should be smaller than Neptune, the mission's focus. And if the telescope can stay at work longer than its current plan, those numbers will only go up.

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Category: Science