Castor

A crowded six-star system about 50 light-years from Earth. It forms one of the “heads” of the twins of Gemini, and is Gemini’s second-brightest star, after nearby Pollux.

Radio Programs

The Twins A goodly supply of twins January 26, 2019

Castor A miniature “star cluster” January 7, 2017

Today on StarDate

Running into a cosmic sandstorm

Sponsor

You can support StarDate radio by sponsoring our program for a day. You'll get your name on the air (or the name of someone else you would like to honor), in StarDate magazine, and on our web site.

Astronomy Gifts

Backyard Guide To The Night Sky

$21.95

Make a Contribution

StarDate depends on the support of listeners and astronomy enthusiasts like you. Please consider making a tax-deductible contribution to StarDate.

Support StarDate

Main menu

You are here

Castor

Radio Programs