51 Pegasi b
Exoplanets galore
Messier 2
Black hole begins to swallow a neutron star
Composite image showing sites of possible ice deposits on Mercury

StarDate Radio: December 7 — Pollux

There’s no formula for predicting just how long a person will live. Genetics, nutrition, exercise, and other factors all play...More »

StarDate Radio: December 7 — Pollux

There’s no formula for predicting just how long a person will live. Genetics, nutrition, exercise, and other factors all play...More »

StarDate Radio: December 6 — 51 Pegasi

A discovery that was announced a quarter of a century ago set off an astronomical Gold Rush. Two European astronomers...More »

Stargazing: December 6

Under dark skies, the star 51 Pegasi is just visible to the unaided eye, high in the southwest at nightfall...More »

StarDate Radio: December 5 — Pulsar Planets

The first confirmed exoplanets were shockers. They orbit the remnant of an exploded star. And astronomers are still trying to...More »

Stargazing: December 5

Betelgeuse, the bright orange star that marks the shoulder of Orion, the hunter, is in the east on December evenings....More »

StarDate Radio: December 4 — First Planet

Gamma Cephei has a couple of distinctions. For one thing, it’s a future North Star. A thousand years from now,...More »

Stargazing: December 4

Gamma Cephei is a future North Star. A thousand years from now, it will be closer to the north celestial...More »

Stargazing: December 3

The shortest day of the year is the winter solstice, which is almost three weeks away. Yet the Sun is...More »

StarDate Radio: December 3 — Earliest Sunset

The shortest day of the year — the day with the least amount of daylight — is coming up on...More »

StarDate Radio: December 2 — Icy Rocks

The ice fields of Antarctica might seem like an odd place to hunt for rocks. But the Antarctic is the...More »

Stargazing: December 2

The Sun is entering Ophiuchus the serpent-bearer, the thirteenth constellation of the zodiac. Our star will remain within its boundaries...More »

Stargazing: December 1

Vulpecula, the fox, is in the west as night falls. The constellation is between the stars Deneb and Altair, the...More »

2020 Sky Almanac

Sky Almanac cover

This year offers up some beautiful skywatching treats, including the opposition of Mars and the closest conjunction between Jupiter and Saturn in four centuries. You can find all the details on these and many others in our 2020 Sky Almanac. We also tell you about the rights and wrongs of astronomy and space exploration in science fiction.

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