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Physics and Astronomy
Librarian-curated research guide for Physics and Astronomy resources.
Operated by the Smithsonian Astrophysical Observatory (SAO), the ADS provides astronomy and physics scientists with access to millions of publications and other research resources
Official site of the Hubble space telescope, with all their latest news and imagery, as well as general resources for learning more and teaching about outer space
A NASA website with information and resources intended for middle and high school students and teachers (includes links to grade-school material at sister site StarChild)
SCOAP3, or Sponsoring Consortium for Open Access Publishing in Particle Physics, provides access to thousands of physics articles and journals fully, freely available online