Spiral galaxy M83
Adam Block / NOAO / AURA / NSF

Bulletin at a Glance

This Week’s Sky at a Glance

Spiral Galaxies Exist — But Why?

February 16, 2010 | New observations of the early universe, combined with models of how galaxies formed and collided in the eons since, are helping cosmologists understand why so many beautiful pinwheels dot the sky. > read more

WMAP Refines “Precision Cosmology”

February 14, 2010 | With seven years of data, the WMAP cosmology satellite has refined the age of the universe and other key cosmic parameters. The results strengthen the “standard model” of inflationary cosmology. > read more 

Supernova Mystery Remains Just That

February 19, 2010 | Despite a recent claim, astronomers still don’t understand an important class of exploding stars. > read more 



Saturn on Feb. 23
S&T: Sean Walker

A Saturn Almanac

November 12, 2008 | Spectacular Saturn is now rising well before midnight. Click here to find printable data on the positions of Saturn’s rings and planets. > read more

Vesta in 2010

January 1, 2010 | Vesta is now a prime binocular target. This week it’s near opposition, shining at magnitude 6.1, and on Tuesday the 16th it threads the gap between Gamma and 40 Leonis. > read more 

Making the Most of Mars

January 25, 2010 | Mars is closer to Earth in late January and early February than it will be again for the next four years. > read more 

Tour February’s Sky by Eye and Ear!

January 30, 2010 | Say “goodbye” to Jupiter and “hello” to Mars, as the midwinter evening skies come alive with activity. Learn to identify what stargazers call the Winter Hexagon, and much more. Host: S&T’s Kelly Beatty. (3.9MB MP3 download: running time: 4m 8s) > read more 

This Week’s Sky at a Glance


Mars at 3:25 UT Feb. 12, 2010
Donald C. Parker

This Week’s Sky at a Glance

February 19, 2010 | Mars is high in the evening sky below Pollux and Castor. It’s starting to fade and shrink a bit, but it’s in best view for your scope earlier in the evening now. > read more


S&T Illustration

Thoughts about Star Charts

February 14, 2010 | The author ponders the dilemmas of providing star charts for observing articles in Sky & Telescope. > read more

Thoughts about Pluto

February 18, 2010 | Eighty years ago, Clyde Tombaugh discovered Pluto while comparing two photographs taken a few weeks earlier. How does his discovery look in light of our current knowledge? > read more 

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