Deep Sky Companion The Messier ObjectsWritten by Stephen James O'Meara, 422 pages, Paperback The bright galaxies, star clusters, and nebulae catalogued in the late 1700s by the famous comet hunter Charles Messier are still the most widely observed celestial wonders in the sky. The second edition of Stephen James O'Meara's acclaimed observing guide to the Messier Objects features improved star charts for helping you find the objects, a much more robust telling of the history behind their

Features of the ZWO ASI290MM Camera

while the efficiency for the three bandpass-filters peaks at almost 70 percent – unheard of for a simple colored glass-filter

Longer 270 mm dovetail saddle to better support larger optical tubes

only known meteorite to hit a moving car

to reduce vignetting

Astroview 80/90

Indexed Drawtube

Full Frame Design

Aperture (mm): 203

8mm (2") barrel for fitting into either size focuser or diagonal

Adjustable Stainless Steel Tripod with Accessory Tray

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