The Year-Round Messier Marathon CDs & DVDs or the Lagoon nebula

or the Lagoon nebula

The observing techniques taught in this book are both easy to learn and powerful

extinction coefficients

Calibrate your telescope so that you know exactly how much sky you see through your finder and through the eyepiece of your telescope

This mirror-image Moon map is perfect for the image-reversed views seen through refractor or catadioptric telescopes

The Year-Round Messier Marathon CDs & DVDs or the Lagoon nebulaBy Harvard Pennington Product Information: 8. 50" by 11. 00", 194 pages, hardbound. Among the deepest satisfactions of amateur astronomy is knowing your way around the sky. From the familiar guideposts of the brightest stars, you confidently point your binoculars or telescope toward the Andromeda galaxy, the Hercules cluster, or the Lagoon nebula. This book was written for the person who wants to become deeply familiar with the most famous list of 110