Features

Carl Sagan Remembered

Reflections on the scientist’s career.

Goodness, Gracious, Great Balls of Fire

Newborn stars create a fierce wind in the galaxy M82.

When Neutron Stars Collide

A burst of gamma rays could signal the merger of two neutron stars – and perhaps wipe out all life within 3,000 light-years.

Playing Cosmology’s Wild Card

A cosmological constant could boost the universe’s age.

Tell Time by the Big Dipper

On a clear night, don’t even bother wearing a wristwatch.

Sky Almanac

Mercury’s at its best for the year, but it’s overshadowed by the brilliant duo of Mars and Hale-Bopp.

Hale-Bopp’s Grand Finale

The great comet of ’97 glows brightly as it passes the sun.

Discover the Spring Sky

A 2- to 6-inch scope reveals the wonders of the season.

From Russia with Love

Enjoy superb images with these Maksutov-Cassegrains.

Observing Gas Clouds in Galaxies

A big scope pulls in HII regions beyond the Milky Way.

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