Hubble Space Telescope view of galaxy NGC 4449
Messier 34 and Messier 36
Valles Marineris on Mars
Orion's Belt
ALMA view of a newly forming planetary nebula

StarDate Radio: March 30 — Mars and Saturn

The planets Mars and Saturn don’t have a lot in common. Mars is small, dense, and rocky. Saturn probably has...More »

Stargazing: March 29

Arneb, the leading light of the constellation Lepus, the hare, is in the southwest as night falls, below brilliant Orion....More »

StarDate Radio: March 29 — Arneb

With every breath, you’re inhaling the “ash” from a nuclear furnace — nitrogen and oxygen created by a star. Many...More »

Stargazing: March 28

Venus, the brilliant “evening star,” teams with the crescent Moon to put on a great show this evening. They are...More »

StarDate Radio: March 28 — Moon and Venus

The clouds of Venus are especially bright. They reflect about two-thirds of the sunlight that strikes them. That makes Venus...More »

Stargazing: March 27

The crescent Moon looks up at the planet Venus this evening. Venus is the brilliant “evening star,” outshining every other...More »

StarDate Radio: March 27 — Wilhelm Roentgen

It’s not unusual for a husband to take a picture of his wife displaying her wedding ring. Until Wilhelm Roentgen...More »

Stargazing: March 26

Betelgeuse has lost some of its luster in recent months. This year, it has dropped to the faintest level ever...More »

StarDate Radio: March 26 — Busy Betelgeuse

Betelgeuse lost some of its luster in recent months. By early this year, the supergiant star was fainter than it...More »

Stargazing: March 25

NGC 4449 is a dwarf galaxy that is forming stars at a rapid pace — star for star, much faster...More »

StarDate Radio: March 25 — ‘Windy’ Galaxies

NGC 4449 is small but busy. The dwarf galaxy looks like it’s recently merged with a couple of other galaxies....More »

Stargazing: March 24

The Moon is new today as it crosses the invisible line between Earth and Sun, so it’s lost from view...More »

StarDate Radio: March 24 — Dwarf Galaxies

Our home galaxy, the Milky Way, is the hub of a galactic empire. It’s not the kind with death stars...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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