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Table of Contents |
Sky & Telescope April 2007
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Spectrum
The Other Side of the Story
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Letters
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News Notes
Superduper Supernova, Titan's Sierras, The First Triple Quasar, and more . . .
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Mission Update
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50 & 25 Years Ago
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Spotlight On . . . The Blue Witch
The Witch Head Nebula shines by reflected glory, thanks to its proximity to one of the sky's brightest stars.
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Battlefield Galactica: Dark Matter vs. MOND
Most astronomers think galaxies are dominated by dark matter. But a few think Newton's theory of gravity is fundamentally flawed.
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Global Surveyor's Last Hurrah
Before falling silent last November, NASA's intrepid Mars orbiter found evidence of recent water flows and fresh impact craters.
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Count Light Pollution Out!
Want to fight the spread of artificial skyglow? Volunteer to count some stars this month!
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Rambling Through the Skies: Private Astronomy
Today's constellations may be officially sanctioned, but the sky was once a free-for-all for anyone who cared to redraw it.
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Northern Hemisphere's Sky
Layers of Constellations
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Northern Binocular Highlight
M67: Cancer's Other Cluster
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Southern Binocular Highlight
Underappreciated NGC 3201
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Southern Hemisphere's Sky
Clustered Along the Milky Way
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Sun, Moon, and Planets
Planets of Dusk and Dawn
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Exploring the Moon
Mystery Maria
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Celestial Calendar
Two Dark-Side Occultations of Regulus
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Deep-Sky Wonders
The Lion's Lair
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S&T Test Report: Smarter Observing with Deep-Sky Planner 4
Are you a time-challenged skygazer? This new software for PCs running Windows can help you organize and log your observations and images.
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New Product Showcase
Portable Pier Lift, Filtering the Skyglow, and more . . .
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Books & Beyond
Of Once and Future Planets, Mapping the Sky onto the Page, and more . . .
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Astronomy Online
High-Definition Living
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Star Trails
Sharing the Sky
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Hobby Q&A
What would our galaxy look like to an observer in the Large Magellanic Cloud? and more . . .
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Gallery
Reader Photos of the Great Comet of 2007
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Index to Advertisers
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Focal Point
A Lesson in What We Don't Know
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