Debris disk around a neutron star
Hubble Space Telescope image of Saturn and several of its moons
Artist's concept of two neutron stars merging to make a black hole
Views of Mont Blanc Observatory, France
Black holes around a ring galaxy

StarDate Radio: September 21 — Zond 5

The first living things to fly to the Moon and back weren’t astronauts, cosmonauts, or even chimpanzees. They were two...More »

StarDate Radio: September 20 — Autumn

Fall arrives in the northern hemisphere this weekend. It’s the autumnal equinox — the point at which the Sun crosses...More »

Stargazing: September 20


M15, one of the brightest globular clusters, is high in the southeast this evening. It consists of hundreds of thousands...More »

StarDate Radio: September 19 — Symbiotes

A star system in the constellation Andromeda is always hoppin’. Its two stars interact with each other, triggering brilliant outbursts....More »

Stargazing: September 19

Mars stands close below the Moon as darkness falls tonight. Although it has faded a good bit since its peak...More »

StarDate Radio: September 18 — Equal Galaxies?

The Milky Way galaxy and its nearest big neighbor, the Andromeda galaxy, are like two children on a see-saw: They’re...More »

Stargazing: September 18

M31, the Andromeda galaxy, is about 2.5 million light-years away, in the constellation Andromeda. Under dark skies, it is just...More »

StarDate Radio: September 17 — Andromeda

One of the most elaborate stories in the night sky offers vanity, love, a big dose of adventure, and a...More »

Stargazing: September 17

Andromeda, the princess, is in the east and northeast as the sky gets dark on September nights. It’s not all...More »

Stargazing: September 16

Look for the ringed planet Saturn near the Moon the next couple of nights. It looks like a bright golden...More »

StarDate Radio: September 16 — Moon and Saturn

The jewels of the solar system may not have been in the family for long. Observations by the Cassini spacecraft...More »

Stargazing: September 15

Antares, the bright orange heart of the scorpion, is among the biggest and heaviest stars in the galaxy. And it’s...More »

StarDate Radio: September 15 — Moon and Antares

Antares is much more than just bright and beautiful. The orange heart of the scorpion is among the biggest and...More »

Current Magazine

In our September/October issue, we'll bring you up to date on the mysterious class of black holes that are heavier than exploded stars but lighter than those in galactic hearts. We'll also introduce you to a group of amateur astronomers that hunts for lost satellites, sometimes helping space agencies re-establish contact with them.


2018 Sky Almanac

Sky Almanac cover

Even though 2018 is more than half gone, you can still plan the rest of this year's stargazing adventures with our 2018 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

Featured Video