Features

Ask Astro

We answer your questions about the sky and the universe.

Eyes on the Universe

Much of what we know about planets, stars, galaxies, and the cosmos stems from the contributions of these 25 landmark telescopes and observatories

To the Edge of Space and Time

With gravity so strong it warps the very fabric of space-time, a black hole is nature at its most exotic.

A Beast in the Core

Nearly every big galaxy seems to harbor a huge black hole – a fossil, perhaps, of an earlier quasar phase.

Ruling the Rings

Saturn may have the prettiest, but all the gas giants have rings. Stark differences among these magnificent systems clue us in on how they form and evolve.

Planet Hunters

Astronomers Geoff Marcy and Paul Butler have discovered more planets than anyone else.

Seeing Red

Far from the black-and-white canvas it appears to the naked eye, the sky glows with glorious pastel shades.

It’s a Bird … It’s a Plane … It’s a Satellite

On a good night you can spot a dozen or more satellites, if you know where and when to look.

Strike a Pose

Celestron’s new 9-1/4-inch Schmidt-Cassegrain telescope boasts a bigger mirror, smarter tracking, and a sturdier mount than the standard 8-inch SCT.

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