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发帖数: 1994 | 1 Sedna of the Outer Solar System
Illustration Credit: R. Hurt (SSC-Caltech), JPL-Caltech, NASA
Explanation: What is the most distant known object in our Solar System? A new answer to this centuries-old question was announced yesterday by NASA with the discovery of a dark red object dubbed Sedna. Although over twice the distance to Pluto, Sedna is
near its closest approach to the Sun. Sedna's highly elliptical orbit will further displace it by 10 times, making it a candidate for the long-hypothesi |
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