• Big Questions - NASA Science: Structure & Evolution of the Universe
  Big Questions NASA has defined a set of space and Earth Science questions that can best be addressed using the Agency’s unique capabilities.  NASA works with the broader scientific community, considers national initiatives, and the results of decade-long surveys by the National Research Council in defining these questions. See also the Science Strategy section for more information about how NASA Science is pursuing these questions.
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• Dark Energy, Dark Matter - NASA Science
  Eventually theorists came up with three sorts of explanations. Maybe it was a result of a long-discarded version of Einstein's theory of gravity, one that contained what was called a "cosmological constant." Maybe there was some strange kind of energy-fluid that filled space. Maybe there is something wrong with Einstein's theory of gravity and a new theory could include some kind of field that creates this cosmic acceleration. Theorists still don't know what the correct explanation is, but they have given the solution a name. It is called dark energy.
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• Harvard-Smithsonian Center for Astrophysics - Digital Video Library
  Videos to Enhance Understanding and Teaching of K-12 Learning Goals The Science Media Group, part of the Science Education Department at the Harvard-Smithsonian Center for Astrophysics and producer of A PRIVATE UNIVERSE, has built an extensive collection of digital video materials supporting science, technology, engineering, and mathematics(STEM) education reform. HS-Digital Video Library
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• How do planets, stars, galaxies and cosmic structure come into being? - NASA Science
  How do planets, stars, galaxies and cosmic structure come into being? In order to understand how the Universe has changed from its initial simple state following the Big Bang (only cooling elementary particles like protons and electrons) into the magnificent Universe we see as we look at the night sky, we must understand how stars, galaxies and planets are formed.
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• Richard Feynman - Science Videos
  Chosen by the New Scientist - best on-line videos 2007. A set of four priceless archival science video recordings from the University of Auckland (New Zealand) of the outstanding Nobel prize-winning physicist Richard Feynman - arguably the greatest science lecturer ever. Although the recording is of modest technical quality the exceptional personal style and unique delivery shine through. The Douglas Robb Memorial Lectures - Part 1 : Photons - Corpuscles of Light Richard Feynman Video - The Douglas Robb Memorial Lectures - Part 1: Photons - Corpuscles of Light A gentle lead-in to the subject, Feynman starts by discussing photons and their properties. The Douglas Robb Memorial Lectures - Part 2 : Fits of Reflection and Transmission - Quantum Behaviour Rich
  View four priceless archival science video recordings from the University of Auckland (New Zealand) of the outstanding Nobel prize-winning physicist Richard Feynman - arguably the greatest science lecturer ever. Although the recording is of modest technical quality the exceptional personal style and unique delivery shine through.
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• The Hubble Diagram - Specific Information
  Teacher's Guide to Specific Sections Introduction Let students read through the Introduction on their own. Ask them why the discovery that the universe was expanding was so unexpected. Point out that its discovery required three separate threads to come together: Einstein's General Relativity, Slipher's measurements of redshifts, and the building of the new 100" telescope on Mount Wilson. Ask them how the three other lines of evidence support the big bang theory. Get them thinking about how different lines of evidence add up to support a scientific theory. Ask: what makes a good theory?
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• The Journey to Palomar | PBS
  It has been said that George Ellery Hale did for the entire universe what Christopher Columbus did only for the Earth. Most people have never heard of Hale, but his life and work had a profound effect on the development of 20th century science in America, most notably--astronomy.\n\nThe Journey to Palomar traces the epic personal and professional quest of the Chicago-born astronomer to build the four largest telescopes of the 20th century, culminating with the 20-year effort to build the million-pound telescope on Palomar Mountain, a project considered the "moon shot" of the 1930s and 1940s. Comes with Teacher's Guide
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• When and how did the elements of life in the Universe arise? - NASA Science
  Following the Big Bang and the gradual cooling of the Universe, the primary constituents of the cosmos were the elements hydrogen and helium. Even today, these two elements make up 98% of the visible matter in the Universe.  Nevertheless, our world and everything it contains—even life itself—is possible only because of the existence of heavier elements such as carbon, nitrogen, oxygen, silicon, iron, and many, many others. How long did it take the first generations of stars to seed our Universe with the heavy elements we see on Earth today?  When in the history of the Universe was there a sufficient supply of heavy elements to allow the formation of prebiotic molecules and terrestrial-like planets
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