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

or the Lagoon nebula

extinction coefficients

Once each year

Each volume presents extensive descriptions of prominent stars and deep-sky objects

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