NASA
Nasa: Image Science Center: Ask the Space Scientist
A NASA space scientist provides 98 questions and answers about the sun, the center of our solar system.
Other
Hong Kong Space Museum
Besides an introduction to exhibitions and events at the museum, the site provides a guide to stargazing, an astronomy FAQ, space news, virtual tours (see site map) and research resources (including Chinese-English star and constellation...
California Institute of Technology
Spitzer Science Center: Red Giant Image
This image features two views of the "bow shock" of a dying star in the Hydra Constellation. The text below the image proceeds to explain a "bow shock" in relation to the red giant star pictured.
California Institute of Technology
Spitzer Science Center: Helix Nebula
Under the heading, "Comets Kick up Dust in Helix Nebula" this site a particular nebula in the constellation Aquarius. In addition to an image, the site provides information on nebulas and star systems.
Massachusetts Institute of Technology
Mit: Open Course Ware: Hands on Astronomy: Observing Stars and Planets
A university-level course in basic observational procedures in astronomy. Covers how to use a telescope, and includes lecture notes.
Other
Astromador: Astronomia Para Amadores
This resources focuses exclusively on astronomy. It's packed with historical facts about space exploration, famous people who pioneered the study of stars and planets. It features chronological list of space exploration, current news,...
British Library
British Library: International Dunhuang Project: Chinese Astronomy Resource
Using the early Dunhuang Star Atlas, an important historical and scientific document of the sky seen from China dating from before AD 700, learn about astronomical history from the perspective of China. Find resources and analysis that...
American Museum of Natural History
American Museum of Natural History: Carl Sagan and the Quest for Life in the Universe
A brief biography of American astronomer and science advocate Carl Sagan.
Other
Paper Plate Education: Serving the Universe on a Paper Plate
Excellent resource for "paper-plate" activities that help simplify various astronomy topics. Learn how to build a "Moon Finder" and "Planet Pointer," and create a paper-plate model that explains the Transit of Venus.