collage of images of Alexei Leonov
CHEOPS in orbit
Io photographed in front of Jupiter
VERITAS array in Arizona

StarDate Radio: October 15 — Sending a Message

A group of scientists and musicians is trying to start a conversation over the back fence. The team sent messages...More »

StarDate Radio: October 14 — Ploonets

Researchers recently added a new term to the astronomy vocabulary: ploonet. It describes an object that started out as a...More »

Stargazing: October 14

The brightest star in Aries, the ram, sweeps across the eastern evening sky this month. Hamal is an orange-giant star...More »

Stargazing: October 13

Tonight is the night of the Hunter’s Moon. It’s the full Moon after the Harvest Moon, which appeared in September....More »

StarDate Radio: October 13 — Hunter’s Moon

Few Americans have to hunt wild game to survive the long, cold winter these days. But that hasn’t always been...More »

StarDate Radio: October 12 — Altair

We’ve seen details on the surfaces of only a few stars other than the Sun. Stars are just so far...More »

Stargazing: October 12

Altair, one of the members of the Summer Triangle, stands high in the south as darkness falls and drops down...More »

Stargazing: October 11

Ursa Major hunkers low in the north on autumn evenings. Americans see its brightest stars as the Big Dipper. In...More »

StarDate Radio: October 11 — CHEOPS

Much of what makes science work is following up. After the discoveries are made, more research is needed to fill...More »

Stargazing: October 10

A handful of bright stars fills the evening sky. Around 10 p.m., yellow Capella is low in the northeast, while...More »

StarDate Radio: October 10 — Fusion

The Sun is a giant nuclear reactor. Every second, it “fuses” together about 650 million tons of hydrogen atoms to...More »

StarDate Radio: October 9 — Rare Earths

A mine in California holds the residue of collisions between dead stars. So do even bigger mines in China. The...More »

Stargazing: October 9

Autumn is prime viewing time for Aquarius, the water bearer. One of the 12 constellations of the zodiac, it appears...More »

Current Magazine

cover of September-October 2019 issue

Our September/October issue explores how magnetic fields influence star formation. We also celebrate the bicentennial of the birth of Leon Foucault, the French physicist whose pendulum demonstrated Earth's rotation.

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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