Inside the April 2007 Issue

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Sky & Telescope April 2007

TABLE OF CONTENTS

Spectrum
The Other Side of the Story By Richard Tresch Fienberg

News Notes
Superduper Supernova, Titan's Sierras, The First Triple Quasar, and more . . .

Mission Update
By Jonathan McDowell

50 & 25 Years Ago
By Leif J. Robinson

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. By Ken Croswell

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. By Govert Schilling

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. By Andrew Chaikin
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Count Light Pollution Out!
Want to fight the spread of artificial skyglow? Volunteer to count some stars this month! By Fred Schaaf
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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. By E. C. Krupp

Northern Hemisphere's Sky
Layers of Constellations By Fred Schaaf

Northern Binocular Highlight
M67: Cancer's Other Cluster By Gary Seronik

Southern Binocular Highlight
Underappreciated NGC 3201 By Les Dalrymple

Southern Hemisphere's Sky
Clustered Along the Milky Way By Greg Bryant

Sun, Moon, and Planets
Planets of Dusk and Dawn By Fred Schaaf
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Exploring the Moon
Mystery Maria By Charles A. Wood

Celestial Calendar
Two Dark-Side Occultations of Regulus By Alan MacRobert

Deep-Sky Wonders
The Lion's Lair By Sue French

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. By David Ratledge

New Product Showcase
Portable Pier Lift, Filtering the Skyglow, and more . . .

Books & Beyond
Of Once and Future Planets, Mapping the Sky onto the Page, and more . . .

Astronomy Online
High-Definition Living By Stuart J. Goldman

Star Trails
Sharing the Sky By David H. Levy

Hobby Q&A
What would our galaxy look like to an observer in the Large Magellanic Cloud? and more . . .

Gallery
Reader Photos of the Great Comet of 2007

Focal Point
A Lesson in What We Don't Know By Ben A. Shaberman