Are super-sized Earths the new frontier?
Astronomers are starting to find exoplanets not much bigger than Earth. Some scientists think these worlds could be more hospitable to life than our planet.
By Ray Jayawardhana
Are these space rock from Mercury?
Angrite meteorites, rare and ancient, date to the birth of the solar system. Did a large asteroid give birth to them — or did they come from the innermost planet?
By Thomas H. Burbine, Jr.
How scientists discovered a solar system "superhighway"
By riding planetary gravity, spacecraft can explore the solar system without using fuel.
By Francis Reddy
Illustrated: Inside Earth's magnetic shield
An invisible structure protects Earth from all but the Sun's worst outbursts. Scientists are starting to understand how it works.
By Francis Reddy; illustration by Roen Kelly
The northern sky's top 10 galaxies
All you'll need is a dark sky and a small telescope to see these galactic gems.
By Michael E. Bakich
Where the northern lights dance
In Tromsø, Norway, pristine fjords and rugged mountains frame some of the greatest auroral shows on Earth.
By Hinrich Bäsemann
How to shoot stars with a webcam
A small, inexpensive video camera offers surprisingly good results when imaging stars.
By Fred Ringwald
Vixen's giant binoculars among largest sold
Use the BT-125-A, and you'll know why many observers love large binoculars.
By Phil Harrington
Astronomy, 2008, November