Messier Monday: Messier’s first original discovery, M3

The handle of the Big Dipper leads you to Arcturus, the brightest star in the Northern Hemisphere. But there’s a deep-sky wonder hiding in plain sight, if you know where to look!

Image credit: Tenho Tuomi of Tuomi Observatory, via http://www.lex.sk.ca/astro/.
Image credit: me, created using the free software Stellarium, available at http://stellarium.org/.
Image credit: me, created using the free software Stellarium, available at http://stellarium.org/.
Image credit: me, created using the free software Stellarium, available at http://stellarium.org/.
Image credit: © 1999-2013 Luís Carreira — Pátio da Astronomia, via http://www.astrosurf.com/carreira/obs2007_01_e.html.
Image credit: © 2006 — 2012 by Siegfried Kohlert, of http://www.astroimages.de/de/gallery/M3.html.
Image credit: Adam Block/Mount Lemmon SkyCenter/University of Arizona, via http://skycenter.arizona.edu/gallery/StarClusters/M3.
Image credit: NOAO, in memory of Allan Sandage.
Image credit: Richard Steinberg of Drexel University, via http://www.physics.drexel.edu/~steinberg/.
Image credit: Krzysztof Stanek and Andrew Szentgyorgyi, via Joel Hartman at http://www.astro.princeton.edu/~jhartman/M3_movies.html.
Image credit: NASA / ESA / Hubble Space Telescope, via the Hubble Legacy Archive and Wikimedia Commons user FabianRRRR.
Image credit: NASA / ESA / Hubble Space Telescope, via the Hubble Legacy Archive and Wikimedia Commons user FabianRRRR.

--

--

The Universe is out there, waiting for you to discover it.

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store
Ethan Siegel

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