1910 promotional illustration for comet pills
Artist's concept of possible Earth-like worlds in other star systems
image of the black hole in the galaxy m87
composite image of a "cannonball" pulsar
dust tails behind a disintegrating asteroid

StarDate Radio: April 21 — Moon and Antares

The Sun is really big — more than a hundred times the diameter of Earth. Yet it’s a mere dot...More »

Stargazing: April 20

The Lyrid meteor shower is building up this weekend. It should hit its peak in the wee hours of Monday...More »

StarDate Radio: April 20 — Lyrid Meteors

A thin but reliable meteor shower is building up this weekend. It should hit its peak in the wee...More »

Stargazing: April 19

The Moon is full today. It stands opposite the Sun in our sky, so sunlight illuminates the entire lunar disk....More »

StarDate Radio: April 19 — Apocalyptic Rumors

Every year or two, we see a scenario play out like this: A web site, book, or other source...More »

Stargazing: April 18

Spica stands to the right or lower right of the Moon at nightfall. It consists of two big, heavy stars....More »

StarDate Radio: April 18 — Moon and Spica

A bright star system with a complicated future keeps company with the full Moon tonight. Spica stands to the...More »

Stargazing: April 17

The golden tresses of Queen Berenice adorn the sky on spring evenings — a spray of stars visible through binoculars...More »

StarDate Radio: April 17 — Alien Climates

Scientists are still working out their models of Earth’s atmosphere — models that become more important as our planet’s...More »

Stargazing: April 16

A sprinkling of faint stars stands high in the east as night falls this evening, above brilliant Arcturus, the brightest...More »

StarDate Radio: April 16 — Cloudy Nights

We don’t have a single picture that shows us the surface of an exoplanet — a planet in a...More »

Stargazing: April 15

Several time bombs are in view this evening. The list includes most of the bright stars of Orion, which is...More »

StarDate Radio: April 15 — Oddball Solar System

Our solar system is an oddball. The way it’s laid out is different from every other planetary system yet...More »

Current Magazine

cover of May-June 2019 issue

Our May/June issue brings you excerpts from new books in astronomy and space science to spice up your summer reading. We'll also bring you summer skywatching notes and charts, Merlin's answers, and more.

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.

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