Future site of the Giant Magellan Telescope in Chile
Artist's concept of K2-138 planetary system
X-ray views of the magnetar near the center of the galaxy

StarDate Radio: March 21 — Moon and Spica

By Earthly standards, a hard vacuum surrounds the surface of the Moon. Yet it’s not a complete vacuum — the...More »

Stargazing: March 20

The Moon will be full tonight, just hours after the start of spring in the northern hemisphere. It will be...More »

StarDate Radio: March 20 — More Vernal Equinox

Spring begins in the northern hemisphere today, as the Sun crosses the equator heading north. For many of us in...More »

StarDate Radio: March 19 — Vernal Equinox

Sometimes, you just can’t trust your lying eyes. If you observe the sky, for example, you might see the Sun...More »

Stargazing: March 19

Spring begins in the northern hemisphere tomorrow as the Sun crosses the equator from south to north, a moment known...More »

Stargazing: March 18

Regulus, the brightest star of Leo, the lion, is just a whisker away from the Moon tonight. The bright star...More »

StarDate Radio: March 18 — Moon and Regulus

The evolution of a star is dominated by one thing: the star’s mass. Heavy stars live short but brilliant lives....More »

Stargazing: March 17

Three bright stars form a tall triangle in the east by about 10 or 11 p.m. The brightest is yellow-orange...More »

StarDate Radio: March 17 — The Dominator

The Sun exerts a mighty influence on the space around it. Our star holds on to eight major planets, perhaps...More »

Stargazing: March 16

The beautiful Pleiades is high in the west as night falls at this time of year. The star cluster looks...More »

StarDate Radio: March 16 — Spinning Stars

The beautiful Pleiades is high in the west as night falls at this time of year. The star cluster looks...More »

StarDate Radio: March 15 — Radio Survey

When astronomers look at the universe, stuff often gets in the way — from clouds to airplanes to asteroids. And...More »

Stargazing: March 15

Ursa Minor, the little bear, wheels high across the north every night. Some of its brightest stars form the Little...More »

Current Magazine

cover of March/April issue

As the work of Kepler space telescope comes to a close, we'll tell you about the planet-hunting satellite's accomplishments and fill you in on its successors. We'll also introduce you to a quartet of women astronomers from antiquity.

2019 Sky Almanac

Sky Almanac cover

Plan for this year's stargazing adventures with our 2019 Sky Almanac, which offers skywatching tips, charts, Moon phases, and much more. And for the rest of the year, we've reduced the price! Order online or call 1-800-STARDATE during regular business hours.

Order online

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