ALMA view of a sunspot
Apollo 17 commander Eugene Cernan poses on the Moon in 1972
sequence of images depicting the merger of M31 and Milky Way galaxies
Infrared view of Orion Nebula and surrounding clouds of gas and dust
Artist's concept of 2016 WF9

StarDate Radio: January 21 — Leading the Dog

Two “dog stars” hunker low in the east and southeast as night falls about now, and scamper higher across the...More »

StarDate Radio: January 20 — More Fornax

There’s no fountain of youth to make people look younger. But there is one for stars. It’s a process that...More »

Stargazing: January 20

The constellation Fornax, which is low in the south at nightfall, has only one modestly bright star, Alpha Fornacis. Binoculars...More »

StarDate Radio: January 19 — Fornax

Almost a century ago, astronomers partitioned the celestial sphere into 88 constellations. Most of them — the famous ones —...More »

Stargazing: January 19

Fornax, the furnace, is quite low in the south as night falls right now. Created in the 17th century, it...More »

StarDate Radio: January 18 — Fast Bursts

When astronomers find a new type of object that goes “boom,” it takes a while to explain it. They have...More »

Stargazing: January 18

Mercury, the solar system’s smallest planet, will be at its greatest distance from the Sun in the morning sky tomorrow....More »

StarDate Radio: January 17 — Super Supernovae II

A supernova that was discovered a couple of years ago has astronomers doing a lot of head scratching. The explosion...More »

Stargazing: January 17

The Orion Nebula is a fuzzy patch of light just below the three bright stars that represents Orion’s Belt. The...More »

StarDate Radio: January 16 — Super Supernovae

Every supernova is a brilliant beacon — a stellar explosion that can outshine an entire galaxy. But in recent years,...More »

Stargazing: January 16

One of the dimmest but best-known constellations of the zodiac is in fine view right now. Aries, the ram, stands...More »

StarDate Radio: January 15 — Scary Asteroids

Astronomers compile catalogs of all kinds of objects: variable stars, black holes, binary stars, and many others. One of their...More »

Stargazing: January 15

From southern latitudes of the U.S., the two brightest stars in the night sky line up in the south tonight....More »

Current Magazine

cover of the 2017 Sky Almanac

Our 2017 Sky Almanac brings you a year's worth of skywatching tips, skymaps, anniversaries in astronomy and space flight, and more.

Featured Video