Guide to the sky 2010
Astronomy's 2010 Guide to the Night Sky
What galaxy superclusters tell us about the universe
Astronomers are working to understand the universe's large-scale structures — how they formed and how they affect cosmic expansion.
What was the Star of Bethlehem?
Astronomy can rule out several candidates for the sight that appeared to the wise men — but it can't eliminate them all.
How do planetary nebulae form?
Over the past decade, astronomers have cracked the code of planetary nebula shapes. Now we know why these stellar coffins appear in such a variety of intricate styles.
Tour the Fornax Supercluster
Medium- to large-aperture telescopes reveal dozens of galaxies in this small region of sky.
Target 40 wonderful winter sky treats
The winter sky is loaded with great deep-sky objects. Through your telescope, you can pick them off like ornaments on a celestial tree.
Astronomy tests a hot new spectroscope
You may have seen sunspots and prominences, but have you observed the Sun's spectrum? The Lhires Lite spectroscope makes such observations easy.
This Month in Astronomy
Bob Berman’s Strange Universe
David H. Levy’s Evening Stars
The Sky this Month
Steven James O’Meara's Secret Sky
Test your vision: The perigee Moon
Glenn Chaple's Observing Basics
Screw-in solar filter hazards
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