Sky & Telescope November 2010

FEATURED ARTICLES

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The Universe of Archimedes
To estimate the size of the universe, Archimedes invented an entirely new way to express big numbers.
By Alan Hirschfield

Closing in on E.T.
SETI hasn't picked up any signals from extraterrestrials yet, but new technologies are greatly increasing the odds.
By Seth Shostak

Legal Aliens
The author takes a wry look at Denver's proposal to establish a commission for diplomacy with extraterrestrials.
By David Grinspoon

A Cloudy Mars in 2010
Though small, Mars was bustling with activity during the recent apparition.
By Don Parker and Jeff Biesh

BEYOND THE PRINTED PAGE

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More Astro News
Visit our website for astronomy news as it breaks.
By The editors of Sky & Telescope

ALSO IN THIS ISSUE

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The Meteors of Autumn
Several different meteor showers sweep across Earth in October and November.
By Alan MacRobert

PlaneWave's 12.-inch CDK Astrograph
Born in the age of digital imaging, this astrograph leaves little to be desired.
By Dennis di Cicco

Fast or Slow?
Here's how your scope's focal ratio affects your images.
By Jesper Sørensen

Treasures of the Celestial King
Explore the huge nebula IC 1396 with our big, labeled photograph.
By Sue French

Galaxy Gauze
Andromeda's NGC 68 group is rich with faint galaxies.
By Ken Hewitt-White

Table of Contents
See what else November's issue has to offer.