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occultation |
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Pluto is the only planet never visited by a spacecraft, and so, for now, occultations are the sole means to study its atmosphere. Alcock and his colleagues propose to use cameras mounted on a trio of telescopes spaced a few kilometers apart to distinguish stellar occultations from mere twinklings due to atmospheric turbulence. They base this whole idea on observations of stellar light blockages, or occultations, during only two occasions. |
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