Sky & Telescope April 2009

FEATURED ARTICLES

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Shedding New Light on Dark Matter
Two instruments may have seen telltale signs from the strange stuff that makes up the bulk of the universe's mass.
By Govert Schilling

A Worldwide Astronomy Marathon
Early April will be amateur astronomy's time to shine for the International Year of Astronomy 2009.
By Mike Simmons

TheSkyX Student Edition
An esteemed planetarium program is now available for PCs and Macs.
By Joe Heafner

BEYOND THE PRINTED PAGE

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Dark Matter
S&T Editor in Chief Robert Naeye interviews scientists associated with the spacecraft that may have detected emissions from dark matter.
By

When Black Holes Collide
Robert Naeye interviews an expert on the theory and observation of gravitational waves..
By

Imaging the Orion-Eridanus Superbubble
S&T senior editor Dennis di Cicco presents high-resolution versions of the photos that he and imagining editor Sean Walker collaborated on.
By

ALSO IN THIS ISSUE

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Challenges on Saturn
With Saturn's rings nearly edge-on, the planet's globe is wide open for view.
By Ralf Vandebergh

Cosmic Relief
Mars: Feel the Vibe
By David Grinspoon

Table of Contents
See what else April's issue has to offer.