Year of the Comet
Comet C/2011 L4 (PANSTARRS)

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Comet C/2012 S1 (ISON)

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Glenn Chaple's Observing Basics

Glenn Chaple's observing basics: Jealous Copernicus

March 2005: Circle Friday, March 11 on your Deep Space Mysteries 2005 calendar.
Contributed by Glenn Chaple
Published: March 1, 2005
Circle Friday, March 11 on your Deep Space Mysteries 2005 calendar. On that date, you'll have a great opportunity to do something even the famous Polish astronomer Nicolaus Copernicus never did: visually capture the elusive planet Mercury. Even during elongations — those infrequent occasions when the planet's orbital motion carries it away from the Sun — Mercury can play hard-to-get in the twilight glow.
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