March 2014 From the President Our February business meeting was highlighted by a lengthy discussion about our upcoming Young Astronomer’s Program and our plans to recognize the knowledge and enthusiasm of youngsters who will represent the future of our hobby. Not only did we have a chance to review the new 5 inch f/5 Dobsonian […]
By Dr. Ethan Siegel Although Saturn has been known as long as humans have been watching the night sky, it’s only since the invention of the telescope that we’ve learned about the rings and moons of this giant, gaseous world. You might know that the largest of Saturn’s moons is Titan, the second largest moon […]
Published on Feb 15, 2014 M46 and NGC 2438 – Open Cluster and Planetary Nebula in Puppis by Glenn Chaple There’s a saying that goes, “You can’t see the forest for the trees.” In the case of the planetary nebula NGC 2438, “you can’t see the nebula for the stars.” NGC 2438 lies within the […]
A book review by Dick Luecke British author Richard Holmes won laurels for his biographies of the Romantic poets. In Age of Wonder he extends his talents to Europe’s second great epoch of scientific discovery—a period roughly from the late 1760s through the 1820s. Holmes describes this fruitful era of science through the lives of […]
EconoDobs Asian Dobs, aka ”EconoDobs” include Synta (Orion, Skywatcherm Buschnell, from China and GSO (Zhumell, Apetura, AstroTech, Lightbridge, DBA and X-Class, from Taiwan How they do out of the box: Usually pretty good optics but hit or miss Low price and good value, bang for the buck Included eyepieces, crayford focusers and finder scopes are OK but not […]
by Donald E. Pensack Collimation is the alignment of the optical parts of a telescope. Though lining up the secondary under the focuser is essential for uniform illumination of the field of view, there are only two critical alignments in Newtonian collimation: the Focuser Axis (aligned by adjusting the secondary mirror), and the Primary Axis […]
By Kandy Rathinasamy I got started with astronomy about a year ago, so I’m a relative newbie. Here are some tips that I hope will help you get started. You don’t need a telescope You don’t need a telescope to get started. There’s a lot to see with the naked eye. Learn about the constellations […]
The eyepiece takes the image produced by the objective and magnifies it and projects it at infinity into your eye.
This time-lapse image was captured in the parking lot one pleasant summer evening. The stars appear to move around a central point, when it is actually the earth that is moving.
About the club
The NSAAC is an association of amateur astronomers who meet and observe from a local site on the North Shore of Massachusetts. Our members share in the beauty of the night sky and the belief that observing should be enjoyable.