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Event Category – General Public Event


The 3rd Annual Messier Marathon at Branched Oak Observatory is Here!

Yes, you may have seen M42- the Orion Nebula or M31- the Andromeda Galaxy, and even a handful of other beautiful “Messier Objects,” but what about the entire catalog of 110 deep-space wonders? We are going to give it a try, and do so ALL in ONE evening! Are we crazy? Well, we are astronomers, so you be the judge. Join us on March 31st / April 1st for just a few hours or for the ENTIRE evening, and you are guaranteed to see a bevy of galaxies, nebulae, and star clusters.

This event, like all of our General Public events, is FREE of charge and open to anyone interested in the night sky. Although not necessary, you are welcome (and encouraged) to bring binoculars or a telescope.

  • This is a FREE event, but donations are very much appreciated ($5 per visitor is suggested).
  • No Registration
  • Open to Everyone
  • Arrive Anytime Between the Times Given
  • Stay for the Entire Event or As Long As You Want
  • No Park Permit Required
  • No Telescope Needed – You are welcome to bring your own equipment!


A Quick Background On the Messier Catalog and Messier Marathons.
Between the years of 1760 and 1781, French astronomer and “comet-hunter,” Charles Messier (pronounced mess-ē-ā), produced a list of 103 “fuzzy objects” in the sky. His catalog was created so he and other comet-hunters could differentiate between permanent celestial objects and the transient phenomena for which they were searching. Messier observed the skies through a 4” telescope from the middle of Paris, France, so his list was somewhat limited to only brighter objects and to only certain parts of the celestial sphere. Between 1921 and 1966, historians found evidence for seven additional objects that Messier (or his assistant) had collected but did not have a chance to append the master list. These objects have since been added to the official catalog bringing the total number to 110.

The Messier Catalog is composed of 56 Open and Globular Star Clusters, 40 galaxies, 11 Nebulae, 1 Double Star, 1 Asterism (a star pattern), and 1 “object” that is in fact a particularly dense patch of stars in the Milky Way. Although there are far larger and more complete catalogs available to astronomers, the Messier Catalog can be thought of as “the best and brightest” deep space objects visible in the northern hemisphere.

Each year, between mid-March and early April, there is a “window of opportunity” to view nearly all 110 Messier objects in a single evening starting strictly at sunset and ending at sunrise. On April 1st, we are going to give it a try… and you are invited! You can attend for just a few hours or go all night if you would like. Whatever you decide, it will be an amazing experience.

Confirmed BOO Volunteers For the Evening:
Michael Sibbernsen (ESSMO / Classroom Presentations), David Dickinson (eVscope observations), Kendra Sibbernsen (eVscope Observations).

TBA (BSO), TBA (Parking), TBA  (BSO). 

Additional BOO Volunteers are encouraged to join if available.

Volunteers: please check back here (as well as your messages) for event confirmation, cancelation, or postponement announcements.

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