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May 2009
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Astronomy magazine
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Features
How the telescope remade the universe
Within half a century of its invention in 1608, the telescope had transformed our view of the cosmos and Earth's place in it.
By Raymond Shubinski
The telescope's 400-year revolution
Early telescopes were about 1 inch wide; today's span some 33 feet. Here's how this crucial tool moved forward.
By Liz Kruesi
Compare the optics of the first three telescope designs.
By Liz Kruesi
Scoping out the great discoveries
From Jupiter's moons to dark energy, scientists have used the telescope to make many extraordinary discoveries.
By Richard Talcott
Experience Galileo's Italy
Walk in Galileo's footsteps in Rome, Florence, and other haunts of the great astronomer.
By William Sheehan
The author of Experience Galileo's Italy explains his appreciations for the great astronomer's life and work.
By Daniel Pendick
Explore the Great Bear's galaxies
Break out your medium-size telescope and search Ursa Major's extragalactic treasures.
By Steve Coe
Follow along for a night of galaxy hunting from Animas, New Mexico.
By Michael E. Bakich
25 top telescopes for starry nights
Set up one of these high-quality instruments, and you'll be in observing heaven.
By Phil Harrington
Departments
This Month in Astronomy
Beautiful Universe
Letters
Bob Berman's Strange Universe
Stephen James O'Meara's Secret Sky
Astro News
The Sky this Month
Glenn Chaple's Observing Basics
New Products
Advertiser Index
Telescope Insider
Web Talk
Reader Gallery
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