The brightest star of the constellation Boötes. It is an orange-star about 37 light-years from Earth.

Radio Programs

Arcturus Measuring the girth of a big star Saturday, March 7, 2015
Bright and Fast A bright star that’s in a hurry Tuesday, April 15, 2014
Colorful Arcturus Adding some color to a bright star Sunday, June 23, 2013
Arcturus Tracing a star’s origins Tuesday, August 28, 2012
Bear Watcher Keeping an eye on the big bear Monday, August 27, 2012


©2015 The University of Texas McDonald Observatory