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

PANSTARRS information

Comet C/2012 S1 (ISON)

ISON information

The Sky This Month
May 2009

Tune into the most observable events in this month's sky.

May 2009 First Quarter Moon
May 2009: May shapes up as a planet observer's dream.
By Alister Ling, Martin Ratcliffe // Published: March 23, 2009
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