Media Resources Al About Space Weather Today's Forecast Home Classroom Resources Image Gallery Exhibits to Go
Navigation bar

This is an image of the sun in H-alpha -- i.e., an image taken through a filter centered on a specific spectral line of Hydrogen, with a wavelength of 6563 A. A high resolution JPG image can be found here. Active regions in this image show up as brighter than their surroundings. The dark, string-like features are filaments.

The image was digitized from a photograph provided by the Space Environment Laboratory, National Aeronautic and Oceanic Administration (Boulder, CO). For more information on this image, see the HAO slideset "The Sun: a Pictorial Introduction", by P. Charbonneau and O.R. White.


  The Space Weather Center is brought to you by the Space Science Institute as part of the National Space Weather Program. Funding is provided by NASA and the National Science Foundation.  

Copyright 1998-1999 Space Science Institute, all rights reserved
Comments? Send email to