Milky Way's structure

Thomas Dame

Bulletin at a Glance

This Week’s Sky at a Glance

The Milky Way’s New Arm

May 25, 2011 | Astronomers have struggled for decades to discern our galaxy’s true shape. But they’re slowly getting the picture, thanks to the discovery of a long arm that traces the grand spiral to its outer limits. > read more

Closeup of a Black-Hole Powerhouse

May 23, 2011 | Come along with radio astronomers as they zoom in on the powerful, high-energy jets of Centaurus A and the supermassive black hole at its heart. > read more

Kepler’s Exoplanets: A Progress Report

May 26, 2011 | The Kepler exoplanet-hunting mission got top press-conference billing at the American Astronomical Society convention in Boston. But some reporters left wanting more. > read more

More Ado about the Cas A Supernova

May 27, 2011 | Legend has it that a bright noon star graced the birth of the 17th century British Monarch Charles II. Could it have been a daytime glimpse of the Cas A supernova? > read more

Sky & Telescope July 2011

May 19, 2011 | Sky & Telescope‘s July 2011 issue is now available to digital subscribers. > read more


Orion Space Probe 3, SkyScanner 100mm, and GoScope 80mm

Rajani Flanders

Three Low-Cost Telescopes

December 13, 2010 | Our review of three high-quality $100 telescopes is now available for free online, complete with audio and video supplements. > read more

The Four-Planet Dance of 2011

March 9, 2011 | Every morning in May 2011, just before sunrise, four planets combine to form fascinating and ever-changing patterns. > read more

Saturn’s New Bright Storm

December 27, 2010 | A massive new storm in the ringed planet’s northern hemisphere is bright enough to see in small telescopes. > read more

This Week’s Sky at a Glance

Dawn view

This Week’s Sky at a Glance

May 27, 2011 | Saturn and Porrima form a striking naked-eye “double star” in the south after dark, with Spica to their left and Corvus below them. At dawn, the waning Moon passes the planet lineup low in the east. > read more


sunset over Mars's Gusev Crater

NASA / JPL / Texas A&M / Cornell

An Epitaph for Rover Spirit (2004-2010)

May 27, 2011 | The lead scientist for the panoramic cameras on Mars Rover Spirit reflects with sorrow, joy, and pride on the life and death of one of the most important spacecraft ever launched. > read more

Let the Star Parties Begin!

April 14, 2011 | Want to gaze at the Milky Way all night or peer into the eyepiece of a 12-foot-tall telescope? Then escape the city lights and head for the nearest “star party.” > read more

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