Features

Chiron: Interloper from the Kuiper Disk?

A handful of distant asteroids have shown astronomers a new part of the solar system.

Big Ears

Two new radio telescopes will reach farther into the universe and show it in vastly greater detail than ever before.

A Brightening Star Reveals Dark Matter

When a few stars in a nearby galaxy brightened unexpectedly, they provided the first direct evidence of dark matter.

Sky Almanac

While Venus and Jupiter dominate the evening sky all month, the Perseids light up the predawn sky on August 12.

Seeking the Speedy Geographos

Armed with binoculars or a small telescope, you can spot the near-Earth asteroid 1620 Geographos as it zips past our planet in late August.

Working in the Digital Darkroom

Three special computer routines let you convert digitized astrophotos into great images.

A Stormy Perseid Forecast?

This year’s Perseid meteor shower promises a great show, with an outside chance of a meteor storm.

The End of the Line

Here’s the latest on what observers will see when Comet Shoemaker-Levy 9 smashes into Jupiter.

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