Features

New Discoveries on the Horizon

Next up for NASA’s Discovery program: a mission to analyze the Moon’s surface followed by another to probe Venus, the Sun, or interstellar dust.

By the Light of Forgotten Suns

The ghostly remains of long dead stars highlight a new image of M31.

Curtains at the Edge of the Universe

Astronomers hope that one day neutrinos and gravitons will help them “see” beyond the microwave background barrier.

Was Einstein Wrong?

An otherwise normal binary star seems to contradict relativity.

Sky Almanac

The bright asteroid Iris cuts between the Pleiades and Hyades and a crescent Moon barely interferes with the Leonid meteor shower.

Visit the Deep-Sky Zoo

Whether you view with the naked eye, binoculars, or a telescope, the sky offers many gaseous nebulae and star clusters that recall animals both exotic and familiar.

A Stunning Planetary Trio

A spectacular twilight gathering of Venus, Mars, and Jupiter awaits skygazers in this month’s evening sky.

Big on Celestial Photography

Dazzling, razor-sharp portraits of the heavens can be yours with a medium- or large-format camera.

Riverside Reflections

You can glimpse the future of our hobby by listening to amateurs and manufacturers who assembled at California’s most popular star party.

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