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July 1991
This issue is currently out of stock and will not be reprinted.
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The world's best-selling astronomy magazine offers you the most exciting, visually stunning, and timely coverage of the heavens above. Each monthly issue includes expert science reporting, vivid color photography, complete sky coverage, spot-on observing tips, informative telescope reviews, and much more! All this in an easy-to-understand, user-friendly style that's perfect for astronomers at any level. |
Features Demise of the Dinosaurs - A Mystery Solved? By
Robert S. Dietz If the dinosaurs were killed off by an asteroid, where did it hit? Planetary scientists think they have found the site. |
pg. 30 |
Is Cosmology a Sometime Thing? By
Tony Rothman We may be livng during the only time in the history of the universe when it is possible to learn about that history. |
pg. 38 |
An Eye on the Violet Universe By
Robert G. Nichols The Gamma Ray Observatory is now orbiting Earth on a mission to probe the high-energy radiation from quasars, black holes, and exploding stars. |
pg. 44 |
ASTRONOMY Sky Almanac When Worlds Align By
Alan Dyer When the Moon's shadow sweeps across the Western Hemisphere on July 11, millions of awestruck onlookers will be plunged into darkness. |
pg. 62 |
Journey to the Center of the Galaxy By
Phil Harrington Take a trip around the heart of the Milky Way, all without leaving your backyard. |
pg. 74 |
ASTRONOMY Tests the Takahashi 76mm Refractor By
Alan Dyer Looking for the best compact telescope on the market? This may be it. |
pg. 80 |
Departments Behind the Scenes Letters Viewpoint Astronomy in the Age of MTV AstroNews An Ultramassive Black Hole? Space News Successful Launch for GRO Amateur News Telescopes for Planetary Observers Reader Reports Astrophotography on a Budget New Astronomy Products Product Reviews Tele Vue's Big Barlow Astronomy Books Meetings and Events Readings and Resources Credits Advertiser Index
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