Open Course Info


Introduction to Astronomy


Icy Asteroid Pictures


This picture is a composite of photos of the Earth, the Earth's Moon, and Pluto, together with artistic conceptions of the distant icy asteroids Sedna and Quaoar:

Icy Asteroid Comparison

 This is an artist's conception of Sedna's neighborhood of the Solar System:

Artist's Conception of Sedna


These pictures were created by:

R. Hurt
National Aeronautics and Space Administration
Jet Propulsion Laboratory
California Institute of Technology
Spitzer Science Center


The star chart background was produced on a Macintosh with the Voyager II program, and are ©1988-93 Carina Software, 830 Williams St., San Leandro, CA 94577, (510) 352-7328. Used under license.
©2004 Scott R. Anderson
Last update: 2004 September 10
Please send questions, comments, suggestions, or corrections to
The material on this website may be reused as described under the Open Course License.

The Gateway to Educational Materials (GEM) is the key to one-stop, any-stop access to thousands of high quality lesson plans, curriculum units and other education resources on the Internet! GEM is a project of the U.S. Department of Education. The Introduction to Astronomy Webbook is catalogued in the Gateway, and Scott R. Anderson is a member of the GEM Consortium.