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Hubble’s Hidden Treasures Competition

March 28, 2012 | Try your hand at creating a beautiful Hubble image and you might win an Apple iPod Touch or iPad. > read more

Vesta: A Study in Black and White

March 30, 2012 | NASA’s Dawn spacecraft is scrutinizing the second-largest asteroid from close range. Yet some aspects of Vesta’s surface — especially splashes of very bright and very dark material — are puzzling. > read more

Hubble Images Stir Up Dark Matter Debate

March 28, 2012 | Dark matter in the “Train Wreck” galaxy cluster (Abell 520) appears to behave in unusual ways. Now, new Hubble images are heating up the debate. > read more

Did the Moon Come From Earth?

March 27, 2012 | New findings show that the Moon might have incorporated more of Earth when it formed than previously thought — a problem for the widely accepted “big splat” hypothesis. > read more

An Emerald-Cut Diamond in the Rough

March 27, 2012 | Astronomers have discovered a rare, rectangular galaxy 70 million light-years away. The dwarf galaxy’s unique history presents a challenge for current theories of galaxy evolution. > read more

The World Celebrates Astronomy

March 28, 2012 | People are coming together this April for Global Astronomy Month 2012, a planetwide celebration of astronomy designed to bring people together through star parties, music and artistic performances, online observing events, and much more. > read more

Tour April’s Sky by Eye and Ear!

March 29, 2012 | April stands to be a great month for planet-watching. Venus and Jupiter are over in the west, Mars is high up in the southeast, and Saturn pairs with the bright star Spica low over the eastern horizon. > read more

Mars Takes Center Stage

March 5, 2012 | The Red Planet (actually yellow-orange) is the brilliant “star” climbing steadily in the east these evenings. Now’s your best chance to examine our next-out planetary neighbor. > read more

Sky & Telescope diagram

This Week’s Sky at a Glance

March 30, 2012 | Bright Venus high in the dusk skims the Pleiades, while Jupiter sinks ever lower. And the Moon joins first one star-and-planet pair, then another. > read more