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Welcome to the
Rockbottom Observatory

Stow, Massachusetts
42.40591812° N    71.52705383° W

NOTICE: We have replaced the lunar phase applet that was causing a java security warning. The applet was safe, just unsigned. We have also remove the site counter for the same reason. We are sorry for any inconvenience.  

The Rockbottom Observatory is a privately owned not for profit facility, privately operated with assistance from members of the Skylight Astronomical Society, Inc of Stow, Massachusetts. The observatory provides Astronomy, Weather and Educational Outreach Programs to the local community. 

Public viewing sessions are held monthly weather permitting. 

See our Calendar of Events for more details.

Current Solar & Lunar Data



  Clear Sky Clock


Clear Sky Clock courtesy of: Attilla Danko         Data is provided by the CMC

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Lat 42.406     Lon -71.527
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