Before and after views of the landing site of the Schiaparelli probe
The ExoMars 2016 mission approaches the Red Planet
Voyager 2 view of Titania, largest moon of Uranus
NASA NEEMO mission

StarDate Radio: October 23 — Big Neighbor

Astronomical distances can be mind boggling. Our closest neighbor, the Moon, is a quarter of a million miles away —...More »

Stargazing: October 22

Andromeda is one of the largest constellations. Its main figure is two streamers of stars that form a skinny V....More »

StarDate Radio: October 22 — Andromeda

Andromeda is a pretty big constellation — it rates 19th out of 88. It’s also ancient — it was first...More »

StarDate Radio: October 21 — Almach

One of the most colorful star systems around climbs high across the sky on autumn nights. A telescope reveals two...More »

Stargazing: October 21

The colorful star system Almach climbs high across the sky on autumn nights. A telescope reveals one star that looks...More »

Stargazing: October 20

The Orionid meteor shower should be at its best late tonight. Unfortunately, the Moon rises around midnight, so it will...More »

StarDate Radio: October 20 — Orionid Meteors

Halley’s Comet won’t return to the inner solar system for almost half a century. But it makes its presence known...More »

StarDate Radio: October 19 — Runaway Giant

A massive star in a nearby galaxy is on the run. It’s moving faster than any other known star —...More »

Stargazing: October 19


M31, the Andromeda galaxy, is visible to the unaided eye as a hazy smudge of light. It stands about half-way...More »

Stargazing: October 18

The Moon has been playing a game of hide-and-seek all year. Most months it has passed in front of Aldebaran,...More »

StarDate Radio: October 18 — Moon and Aldebaran

The Moon has been playing a game of celestial hide-and-seek all year long. Almost every month, it’s passed directly in...More »

StarDate Radio: October 17 — More ExoMars

In four years, the European Space Agency plans to send a rover to Mars. It’ll be the agency’s most ambitious...More »

Stargazing: October 17

One of our closest stellar neighbors is just visible to the unaided eye in the constellation Eridanus, well to the...More »

Current Magazine

cover of November-December issue

Learn how an eclipse influenced a presidential election more than a century ago, and get up to date on Eta Carinae, a closely studied star that could explode as a supernova.

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