double ring
esiegel | August 19, 2013"We dance round in a ring and suppose, but the secret sits in the middle and knows." -Robert Frost
It's time again for another Messier Monday! To kick off each week, we've been taking a look at one of the 110 deep-sky objects that make up the Messier catalogue. Compiled in the 18th Century to help skywatchers avoid these fixed night sky wonders (so that they could better hunt comets), these represent some of the most viewed and easily visible nebulae, star clusters and galaxies visible from our home world.
Image credit: Tenho Tuomi of Tuomi Observatory, via http://rockpoint.dyndns.org/.
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