Features

Inflating the Cosmos

Cosmologists believe that the universe grew at a phenomenal rate in the instant just after the Big Bang.

Ka-Boom! How Stars Explode

For decades astronomers tried to decipher exactly how stars explode. Now recent models suggest neutrinos provide the missing kick to nature’s most violent events.

Observer of the Gas Giants

Planetary scientist Heidi Hammel revels in the surprisingly dynamic atmospheres of the outer planets.

Something Instead of Nothing

How did the universe arise out of the nothingness that preceded the Big Bang?

Before Galaxies Were Galaxies

By searching deep into the cosmos, astronomers may soon understand how galaxies formed.

Dusty Infant Stars: A Fine Sight

Nearby open star clusters, such as the Pleiades, Hyades, and much of the Big Dipper, offer a visual treat even when seen with little or no optical aid.

Celestron’s Big Bad Cat

This 9-1/4-inch Schmidt-Cassegrain telescope provides a large aperture in a portable package.

Ask Astro

A leading astronomer answers your questions.

Observing Perek-Kohoutek Planetaries

Although they aren’t the brightest objects in the sky, these softly glowing planetary nebulae make fine targets for big telescopes.

Stargazing at Kitt Peak

America’s national observatory opens its doors to amateurs wanting to observe from their premier site.

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