Features

OK, Where Are They?

Although many think our Galaxy teems with civilizations, life – and particularly intelligent life – may be exceedingly rare.

Unwinding the Helix

Hubble shows that the interior of this famed planetary nebula contains thousands of tiny, comet-shaped globules.

Cosmic Billiards

It used to be a normal binary, but SS Lacertae appears to have lost one of its members when another star collided with it.

Starmaker

Forget the notion that stars form gently from collapsing gas clouds. The real story is one of whirling disks and vast outflows.

Sky Almanac

Jupiter, Uranus, and Neptune all reach opposition in July, appearing at their best for the year.

Showtime for Hale-Bopp

The next great comet becomes visible to the naked eye this summer, a prelude to next year’s spectacular show.

Hyakutake’s Spring Surprise

The great comet of 1996 came out of nowhere to astound amateur and professional astronomers alike.

Plunge into the Lagoon

Warm summer nights and a modest scope are all you need to explore the three-dimensional nature of this stellar nursery.

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