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Description Sky & Telescope - September 2013 English | True PDF | 90 pages | 17.2 mb FEATURES 16 The History of Water on Mars How many times has NASA discovered water on Mars? We set the record straight. By Emily Lakdawalla 24 Solving the Quasar Puzzle Fifty years ago, recently discovered “radio stars” began revealing their exotic secrets. By Bradley Peterson 30 Deciphering Starlight In Europe, many amateurs are engaging in professional-level research. By Jan Hattenbach 36 An Astronomical Revival In western North Carolina, philanthropists have revamped a former military satellite-tracking station, turning it into a leading hands-on astronomy education center. By Ashley Yeager 68 Eyepieces: Windows on the Universe Understanding the basics will help you select from the cornucopia of modern eyepieces. By Alan French 72 Piecing Together the Sun & Moon Here’s an easy technique for creating expansive images of the Sun and Moon using modest sensors. By Tim Jensen OBSERVING SEPTEMBER 43 In This Section 44 September’s Sky at a Glance 45 Binocular Highlight By Gary Seronik 46 Planetary Almanac 47 Northern Hemisphere’s Sky By Fred Schaaf 48 Sun, Moon & Planets By Fred Schaaf 50 Celestial Calendar By John E. Bortle & Alan MacRobert 54 Exploring the Solar System By J. Kelly Beatty 56 Deep-Sky Wonders By Sue French 60 Going Deep By Ken Hewitt-White S&T TEST REPORT 62 S&T Test Report By Dennis di Cicco ALSO IN THIS ISSUE 6 Spectrum By Robert Naeye 8 Letters 9 75, 50 & 25 Years Ago By Roger W. Sinnott 10 News Notes 42 New Product Showcase 66 Telescope Workshop By Gary Seronik 76 Gallery 86 Focal Point By Christopher Cokinos Related Torrents
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