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Astronomy版 - Astronomy Movie of Day: Four Years of Saturn
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发帖数: 1994
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Four Years of Saturn
Credit & Copyright: Alan Friedman
Explanation: Saturn and its magnificent ring system can offer even casual
astronomers the most memorable of telescopic sights. Wandering between Leo
and Cancer this month, a bright Saturn is well placed for viewing in evening
skies. But from our earthbound perspective, the tilt of Saturn's rings does
change with time. In 1995 and 1996 the broad rings were edge-on and nearly
invisible, gradually opening to a spectacular maximum tilt of about
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