Volcanoes on Tharsis Ridge, Mars
Jupiter's Great Red Spot and surrounding cloud bands
Mercury transits the Sun, May 2016
2006 transit of Mercury

StarDate Radio: May 25 — The Llama

Late spring is a good time to look for the constellation Centaurus, the mythological half-man, half-horse. His head and shoulders...More »

StarDate Radio: May 24 — Grand M81

A perfect spiral galaxy would include a bright, round “bulge” of stars in the middle; glittering spiral arms wrapping all...More »

Stargazing: May 24

Under clear, dark skies you can spot the spiral galaxy M81 with binoculars. At nightfall, it stands below the bowl...More »

StarDate Radio: May 23 — Disappearing Stars

There’s a time and place for everything — especially for the stars. Each star has its own season — a...More »

Stargazing: May 23

As the last blush of twilight begins to fade away, look almost due west for Procyon, the little dog star....More »

StarDate Radio: May 22 — Mars Opposition V

The Moon and three bright companions arc low across the south tonight. The planet Saturn is close to the right...More »

Stargazing: May 22

The Moon and three bright companions arc low across the south tonight. The planet Saturn is close to the right...More »

StarDate Radio: May 21 — Mars Opposition IV

Mars is earning its fearsome reputation this month. The planet named for the ancient god of war lines up...More »

Stargazing: May 21

Mars lines up opposite the Sun tomorrow, so it shines at its brightest for the next two years. It looks...More »

StarDate Radio: May 20 — Mars Opposition III

Despite the sand and abundant sunshine, the surface of Mars isn’t exactly South Beach. The planet’s thin atmosphere is...More »

Stargazing: May 20

Mars is in the southeast as darkness falls tonight, below the Moon. The Moon will move closer to the bright...More »

StarDate Radio: May 19 — Mars Opposition II

If you walk through a field of mature dandelions on a windy afternoon, you’ll see thousands of little seed pods...More »

Stargazing: May 19

Mars is putting in its best appearance of the year this week. It rises around sunset, remains in view all...More »

Current Magazine

cover of May-June issue

Our Summer Reading Issue is here! In it, you'll find excerpts from new books in astronomy and space science. We'll also bring you skywatching tips and charts, plus the latest astronomy news.

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