Online Simulations & Animations
1. PhET Simulations - Collection of interactive Science simulations
2. University of Nebraska Simulations - Excellent assortment of Physics and Astronomy Simulations and Demonstrations
3. WolframAlpha - Ask (almost) any mathematics related question and get an answer from this website.
Downloadable Programs
1. Stellarium - This amazingly detailed planetarium software allows you to look at the sky from any place the Earth at any time. You can zoom in to look at Planets, Nebulae or Galaxies or zoom out to see the entire Milky Way.
Citizen Science Sites
1. Planethunters - An amazing Citizen Science Project searching for extrasolar planets
2. Zooniverse - A collection of dozens of different Citizen Science Projects ranging from Astronomy to Biology to Sociology
3. AAVSO DSLR Tutorial - An introduction to DSLR photometry
YouTube Videos
1. Size of Stars and Planets - Check out how big objects in the universe are
2. Physics of Freefall - Demonstration of Physics students studying the effects of Freefall on Harry Potter
3. CERN and the Standard Model - A video describing how the Large Hadron Collider Works
4. Pale Blue Dot - A wonderful commentrary about our place in the universe by Carl Sagan
5. Travel Inside a Black Hole - This video provides a hypothetical trip into a black hole
6. Powers of Ten - An old video (originally from the 1970s) showing how scientific notation is used to measure different distance scales.
7. Hubble Deep Field - Arguably the most important image of all times. The Hubble Ultra Deep Field looks deep into space and time to give us a glimpse of our place in the cosmos.
