This lab takes you to the next step in the cosmic distance ladder: figuring out the distances to stars other than the Sun. Astronomers derive distances to the nearest stars by a form of triangulation called stellar parallax, a most simple and direct method that relies on no assumptions other than the geometry of the Earth's orbit around the sun.

The steps to follow:

• Write your answers down in a separate sheet of paper.
• Read the introduction.
• Learn about stellar parallaxes.
• Use the Parallax Java Demo of Science !
• Measure the distances to a few stars.
• Proper motion

This page is maintained by Luis Mendoza .
Suggestions, comments, and questions should be sent to: mendoza@astro.washington.edu
Last update: Feb.13,1998

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