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