Messier Monday: Messier’s Last Original Open Cluster, M93

How the last open cluster ever discovered by Messier himself still holds some amazing secrets and wonder more than 200 years after its discovery.

Image credit: Tenho Tuomi of Tuomi Observatory, via http://www.lex.sk.ca/astro/.
Image credit: me, using the free software Stellarium, via http://stellarium.org/.
Image credit: me, using the free software Stellarium, via http://stellarium.org/.
Image credit: me, using the free software Stellarium, via http://stellarium.org/.
Image credit: RoryG of Eastex Astronomy, via http://eastexastronomy.blogspot.com/2010/08/cluster-of-open-clusters.html.
Image credit: © 2006 — 2012 by Siegfried Kohlert, via http://www.astroimages.de/en/gallery/M93.html.
Image credit: Two-micron All Sky Survey (2MASS), IPAC.
Image credit: Digitized Sky Survey (DSS), via Courtney Seligman at http://cseligman.com/text/atlas/ngc24.htm#2447.
Image credit: Messier 93 via NOAO / AURA / NSF.
Image credit: Jim Misti of Misti Mountain Observatory, via http://www.mistisoftware.com/astronomy/Clusters_m93.htm.

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Ethan Siegel

The Universe is: Expanding, cooling, and dark. It starts with a bang! #Cosmology Science writer, astrophysicist, science communicator & NASA columnist.