Diagram of the orbit of 2014 UN271, a giant comet in the outer solar system
1959 artist's concept of a nuclear-powered rocket
Juno spacecraft view of Ganymede
annular solar eclipse

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StarDate Radio: June 24 — Winds of Mars

That’s the sound of the winds of Mars, recorded by the Perseverance rover after it landed in February. It’s the...More »

Stargazing: June 23

Mars is passing in front of a star cluster known as M44, the Beehive. They are quite low in the...More »

StarDate Radio: June 23 — Mars and the Beehive

If you have a pair of binoculars, this evening is a good time to break them out. They’ll provide an...More »

StarDate Radio: June 22 — Moon and Antares

If you gaze into the summer night sky in a million years, it’ll look a lot different than it does...More »

Stargazing: June 22

Antares, the brightest star of Scorpius, stands close below the Moon at nightfall. The star is perhaps a dozen times...More »

Stargazing: June 21

Delta Lyrae, which is about halfway up the eastern sky at nightfall, consists of two stars, one blue and one...More »

StarDate Radio: June 21 — Pioneering Telescopes

Nancy Roman and Vera Rubin heard it many times: astronomy isn’t for girls. Neither of them paid much attention, though....More »

Stargazing: June 20

Today is the summer solstice in the northern hemisphere. It’s the start of the summer season and the longest day...More »

StarDate Radio: June 20 — Summer Solstice

The residents of Wiseman, Alaska; Murmansk, Russia; and Tromsø, Norway, might be having a hard time getting a good night’s...More »

StarDate Radio: June 19 — Moon and Spica

Every star in the night sky is moving around the galaxy in a hurry — hundreds of thousands of miles...More »

Stargazing: June 19

Spica, the brightest star of the constellation Virgo, hangs below the Moon as night falls. The star is 250 light-years...More »

Stargazing: June 18

The second-closest star system to our own, Barnard’s Star, is in the east-northeast at nightfall. The star is so faint,...More »

StarDate Radio: June 18 — Jhelum Stream

Most of the stars of the Milky Way were born here. But quite a few were born in other galaxies...More »

Current Magazine

cover of July-August 2021 issue

In the July/August issue, we recall the accomplishments and discuss the legacy of the giant Arecibo radio telescope, which collapsed late last year. We’ll also tell you how scientists are helping prepare for future long-duration space missions.

2021 Sky Almanac

Sky Almanac cover

This year offers up some beautiful skywatching treats, including two good lunar eclipses and several planetary conjunctions. You can find all the details on these and many others in our 2021 Sky Almanac. We also tell you about some amazing dead or dying stars—some of them spectacular, all of them fascinating.

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