NASA
Nasa: The Sun
An introduction to the Sun including its size and distance from the Earth, sunspots, flares and coronal mass ejections.
NASA
Nasa: Imagine the Universe: The Sun
Site discusses the regions of the Sun's atmosphere such as the Photosphere, Chromosphere, and Corona. Provides sources for educators as well as additional links for students.
NASA
Nasa Star Child: The Sun
Get to know our nearest star with this introduction to the sun. Listen to the information in an audio file. Vocabulary words are linked to a glossary of terms. Features include links to other interesting facts and a printable version of...
University Corporation for Atmospheric Research
Ucar: Solar Filaments
Solar filaments are dark lines or curves that sometimes appear in pictures of the Sun. Here you can learn all about them.
University Corporation for Atmospheric Research
Ucar: The Photosphere: The "Surface" of the Sun
The photosphere is the visible "surface" of the Sun. View pictures and read a description of the photosphere in this article.
University Corporation for Atmospheric Research
Ucar: Coronal Holes in the Sun's Atmosphere
Coronal holes are areas in the Sun's atmosphere that appear dark in X-ray and ultraviolet images of the Sun. View a picture and read a description of coronal holes in this article.
Other
The Virtual Sun: The Atmosphere of the Sun
The Virtual Sun is part of a site detailing the Sun, this page provides a brief overview of the corona, or atmosphere, of the sun. Content includes several movies which depict the corona.