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Review: Celestial smoke and mirrors

点击量:   时间:2017-05-17 07:01:17

By Marcus Chown IN THE 19th century, astronomers were convinced that Venus sported its own version of our snow-capped Himalayas, that the moon was circled by its own set of mini-moons, and that the newly discovered Neptune boasted a ring system much like Saturn’s. There were even claims by competent observers that when the moon sailed in front of a star in the night sky, the star would sometimes jump in front of the moon, hover there for a while,