Comet 67/P Churyumov-Gerasimenko on September 29
Labeled structure of the Milky Way galaxy
Composite view showing plumes of water eruption from Jupiter's moon Europa
Biosphere 2
H.G. Wells created the alien invasion genre

StarDate Radio: September 30 — Old Clusters

If you have dark skies and a pair of binoculars, you can scan for some of the oldest stars in...More »

StarDate Radio: September 29 — Milky Way Halo

There’s a lot more to the Milky Way than meets the eye.

Most of what we think of as the...More »

Stargazing: September 29

Some of the oldest stars in the galaxy congregate in the globular cluster M2. It is in the southeast at...More »

StarDate Radio: September 28 — The Milky Way

The next few evenings offer a great chance to see the Milky Way — the hazy band of light that...More »

Stargazing: September 28

The next few evenings offer a great chance to see the Milky Way, the hazy band of light that outlines...More »

StarDate Radio: September 27 — Moon and Mercury

If you like sunrises and sunsets, the planet Mercury would be an interesting world to visit. The planet has no...More »

Stargazing: September 27

Mercury lurks quite low in the east about 45 minutes before sunrise. It looks like a fairly bright star, but...More »

StarDate Radio: September 26 — Moon and Regulus

The Moon cozies up to a “dwarf” in the wee hours of tomorrow morning: Regulus, the brightest star of Leo,...More »

Stargazing: September 26

The Moon cozies up to Regulus, the brightest star of Leo, the lion, in the wee hours of tomorrow morning....More »

StarDate Radio: September 25 — Biosphere 2

One of the oddest experiments of the 20th century began 25 years ago tomorrow. Eight volunteers sealed themselves inside Biosphere...More »

Stargazing: September 25

Tiny Triangulum, the triangle, wedges between the prominent constellations Andromeda and Aries. Its three brightest stars form an isosceles triangle,...More »

StarDate Radio: September 24 — Autumn Star

The best sign in the night sky that fall has arrived is the appearance of the “autumn star.” It’s the...More »

Stargazing: September 24

The best sign in the night sky that fall has arrived is the appearance of the “autumn star.” It’s the...More »

Current Magazine

cover of September-October issue

In this issue, get the latest on the search for a large, unseen planet some astronomers think is lurking in the Kuiper Belt, and meet pioneering 19th-century British astronomer Elizabeth Brown, who traveled to Russia to study a solar eclipse.

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