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evaporating HD 209458b

ESA / Alfred Vidal-Madjar (Institut d’Astrophysique de Paris, CNRS, France)

Bulletin at a Glance

This Week’s Sky at a Glance

An Evaporating Exoplanet?

January 20, 2012                                                                | Brief, variable dips in the light from a low-mass star have left astronomers wondering what strange object could be periodically blocking the starlight. Their hypothesis? A closely-orbiting planet is disintegrating before their eyes. > read more

Vast New Trove of Variable Stars

January 20, 2012                                                                | Newly online: light curves for 198 million stars. The latest great mass of variable-star data comes from the Catalina Sky Survey — which is actually looking for asteroids. > read more

Sky & Telescope March 2012

January 17, 2012                                                                | Sky & Telescope‘s March 2012 issue is now available to digital subscribers. > read more


Asteroid 433 Eros


A Rare Flyby of Asteroid Eros

January 13, 2012                                                                | The grandaddy of near-Earth asteroids brightens to magnitude 8.6 as it flies by Earth in late January and early February. > read more

New Supernova in Leo

January 9, 2012                                                                | Along with the usual galaxies, dark matter, and exoplanets, the American Astronomical Society’s January meeting is abuzz with the discovery of a supernova by a team of amateurs. Astronomers are rushing to observe the explosion before it fades. > read more

Tour January’s Sky by Eye and Ear!

December 30, 2011                                                                  | With every New Year, millions of us resolve to do something, anything, different or better in the coming year. So let’s resolve to get outside and enjoy the night sky more. Venus, Jupiter, and a host of winter stars await you. > read more

Jupiter: Big, Bright, and Beautiful

September 23, 2011                                                                | The “King of Planets,” which will dominate the evening sky from late 2011 through early 2012, is a captivating sight no matter how you look at it. > read more

Meteor Showers in 2012

December 25, 2011                                                                  | Sky & Telescope predicts that 2012’s best meteor shower should be the Quadrantids in January, but this will also be a good year for the Perseids in August and the Geminids in December. > read more

This Week’s Sky at a Glance

Evening twilight

This Week’s Sky at a Glance

January 20, 2012                                                                  | Jupiter is shrinking, Mars is growing, Orion stands high, and the waxing crescent Moon will soon pass Venus. > read more


Globe at Night in 2011

Globe at Night

Make the Effort for “Globe at Night”

January 19, 2012                                                                | This week marks the kickoff for a worldwide campaign to measure the darkness of night skies everywhere. It’s a fun, easy, and worthwhile activity for you and your family. > read more

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