The Physics To Go website will be unavailable Friday evening through Saturday afternoon as electrical work occurs in the American Center of Physics server room. Down time will begin at 6PM Eastern Time on Friday. Service is expected to resume by 6PM on Saturday, July 30.

Sun Feature Summary

Type:
Physics in Your World
Title:
Sun
Description:
You are looking at the sun, imaged in extreme ultraviolet light (invisible to us) and shown in false color. To learn more about the sun, visit this this National Geographic article, and also this Hyperphysics page.

Notice how irregular the edge of the sun looks. Hot matter streams from the surface and returns, or occasionally some breaks off and heads out into the solar system. See From Physics Research for more information on this matter and how it moves.

This image was captured by NASA's Solar Dynamics Observatory on March 26, 2013.

(This feature was updated on April 9, 2013.)
Image:
image credit: Solar Dynamics Observatory/NASA; <a href="http://sdo.gsfc.nasa.gov/" target="_blank">image source</a>; <a href="http://www.compadre.org/informal/images/features/Sun--surface-large.gif" target="_blank">larger image</a>
image credit: Solar Dynamics Observatory/NASA; image source; larger image
Image URL:
http://www.compadre.org/Informal/images/features/Sun--surface-large.gif
Featured:
April 1, 2013 - April 16, 2013