Features

The First New Planet

The discovery of Uranus, the first planet identified since antiquity, changed astronomy forever.

Polaris, the Code-Blue Star

Why has the North Star’s variable heart stopped beating?

How Far to Virgo?

Studies of the light from Cepheid variables in the Virgo Cluster of galaxies is adding fuel to the fierce debate over the size and age of the universe.

Sky Almanac

Observers with telescopes can witness Jupiter eclipsing its bright satellite Ganymede, and naked-eye viewers can look on as the Moon sweeps past Mercury, Venus, and Saturn in the morning sky.

Spy the Young Moon

March offers eagle-eyed observers two chances to spot the slimmest of crescent Moons.

Have You Seen the Zodiacal Light?

This subtle, milky-white flow appears in the west on March evenings, after the last vestiges of twilight disappear.

Challenging Planetary Nebulae

The stardust and nebulous remnants of dying stars reveal their subtle details in even a modest backyard scope.

The 12.5-inch PortaBall

This large-aperture Dobsonian sets a new standard in maneuverability.

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