Smashing the Distance Record
An exploding star establishes a new benchmark for most-distant known object in the universe.
By Edo Berger
Ice Age Impact
Scientists are debating whether a comet triggered the extinction of the large North American mammals.
By Ivan Semeniuk
The Cosmologist Left Behind
Edwin Hubble usually gets the credit, but Vesto Slipher saw the first signs that the universe was expanding.
By Marcia Bartusiak
BEYOND THE PRINTED PAGE
Jupiter Without Moons
On the night of Sept. 2-3, all of Jupiter's moons are hiding either in front of the planet, behind it, or in its shadow. The sequence of events leading up to and away from this rare event is fascinating to watch.
By Tony Flanders
ALSO IN THIS ISSUE
The globular clusters near the galactic core are amazingly diverse.
By Sue French
The AT106 Refractor
A 4.2-inch triplet APO for just $2,100.
By Alan Dyer
Table of Contents
See what else September's issue has to offer.