SUNSET: 
Color Balance with eXcalibrator
To accurately balance color CCD images, there are a number of techniques and tools to get you in the ballpark. I use eXcalibrator to balance all my color-filtered images. The program analyzes your red, green and blue FITS files in search of white stars, then automatically computes RGB ratios based…
Updates on Comet PanSTARRS
Comet PanSTARRS is fading, but (as of late April now) it's moving high in the north approaching Polaris. So, at last, it's visible in a dark sky all night.
Einstein's Telescope: A Gallery
All photos courtesy of Eden Orion. Eden Orion Eden Orion Eden Orion Eden Orion Eden Orion Eden Orion Eden Orion Eden Orion Eden Orion
Sky & Telescope May 2013
FEATURED ARTICLES Saturn’s Amazing Rings Astronomer’s understanding of these beautiful bands has come a long way since Galileo first spied “a case so surprising” in 1610. By J. Kelly Beatty How Worlds Get Out of Whack Several gravitational mechanisms can cause planets to migrate substantial distances from their formation orbits.…
The asteroid occultation of July 29, 2013
As told in the July 2013 Sky & Telescope, on the morning of July 29th a 9.1-magnitude orange star in Aries will vanish for up to 3 seconds behind the invisibly faint asteroid 1074 Beljawskya, as seen from a narrow track running from west Texas through southern Missouri, Ohio, southeasternmost…
The asteroid occultation of June 11-12, 2013
As told in the June 2013 Sky & Telescope, on the morning of June 12th a 6.4-magnitude star in southern Ophiuchus east of Antares will wink out for up to 4 seconds along a track from Oklahoma across northwest Texas, southern New Mexico, and southern Arizona, when it is occulted…
The Battle of Chancellorsville
In a feature article of the May 2013 issue of Sky & Telescope, author Don Olson highlights the role of the Moon in Stonewall Jackson's fatal wounding. Below, we feature a gallery of images that couldn't fit in the magazine. This circa-1890 painting shows Stonewall Jackson at the Battle of…
Sky & Telescope April 2013
FEATURED ARTICLES Exploring Caves on Other Worlds Future colonists on the Moon and Mars will initially live in caves. That’s why scientists today are on the lookout for underground passages.By Robert Zimmerman Liquid Astronomy The Large Zenith Telescope’s mercury mirror provides critical insights for next- gen instruments.By Eagle Gamma Remembering…
Roundup for Russian Meteor
The meteoroid that exploded over Chelyabinsk, Russia, on February 15, 2013, left the world reeling. In this article you can find information and links to all our coverage of the event.
Cassini's Take on Saturn's Rings
Images by NASA's Cassini spacecraft reveal the wondrous Saturn system in fantastic detail, providing fodder for detailed simulations of what's afoot in the rings.
Caves on the Moon and Mars
As Robert Zimmerman’s cover story of the April 2013 issue explains, Earth is not the only world in the inner solar system with caves. The same volcanic processes that created some of Earth’s caves also occurred on the Moon and Mars. Using imagery from a variety of orbiters, geologists have…
Sky & Telescope March 2013
FEATURED ARTICLES Cosmic Extremes The universe is faster, colder, and wackier than anything we can possibly comprehend. By Bryan Gaensler Where Goes the Rain? Saturn's moon Titan has a mysterious weather cycle. By Donald F. Robertson Revitalize Your Club Meetings Webinars can add variety and depth to your club gatherings…
How to Get involved in Amateur Research
Backyard astronomers will continue to be essential to the research community — here are some ways you can participate.
Sky & Telescope February 2013
FEATURED ARTICLES Secrets of the Northern Lights After centuries spent marveling at auroras' spectacular and fearsome displays, people have solved many of their mysteries.By Pål Brekke The Moon and the Mystery of the Hunley The Moon and tides played major roles in the successful attack and disappearance of the Confederate…
Lifting Titan's Veil
Fall with the Huygens probe through Titan's atmosphere and see extra images connected with our March 2013 article on Titan's weather.
Sky & Telescope Errata: 2013
This article lists all known errors in issues of Sky & Telescope for 2013.
Sky & Telescope January 2013
FEATURED ARTICLES Curiosity Hits the Road The newest, most capable, and most expensive rover ever launched is just beginning its two-year exploration of Mars and the planet's suitability for life.By J. Kelly Beatty Dark Matter in the Discovery Age Using a variety of experiments, scientists may be on the verge…
Detecting Dark Matter
Dark matter was discovered 80 years ago when astronomer Fritz Zwicky spied a galaxy cluster whirling so fast, the galaxies were bound to fly apart unless something — something less luminous than ordinary stars or gas — held them together. Decades later, the scientific community concedes the existence of dark…
Sky & Telescope December 2012
FEATURED ARTICLES Cosmic Collisions Astronomers seek direct observational evidence for multiple universes.By Camille M. Carlisle Why Do Asteroids Come in Pairs? A surprisingly large fraction of small bodies come in binaries and triplets.By Michael Shepard Changing Times for U.S. Astronomy The budgetary writing is on the wall for national observatories.By…
Asteroid Moons
In the past decade, new observations have shown that asteroids are no longer the solitary, dense, potato-shaped rocks we thought them to be, orbiting the Sun unchanged eon after eon. The December issue of S&T describes the latest research that paints a different picture. Asteroids, it turns out, are porous…
