• Time-Lapse photography of stars near Polaris, without star trails

  • Time-Lapse photography of stars near Polaris, with star trails. The bright star near the center is Polaris; note that it barely moves.

  • Comet Hale-Bopp

  • Lunar Eclipse Note that the shadow of Earth on the moon is an arc. Also, see that when the moon is fully eclipsed, it is not invisible, but rather glows a deep orange-red color.

  • Sun's path against background stars -- Heliocentric perspective

  • Lucretius: The Nature of the Universe (complete work)

  • Harmonics in music

  • Polycrates' Tunnel

  • Standing Waves Demonstration 1

  • Standing Waves Demonstration 2

  • Star Charts I

  • Star Charts II

  • Venus Phases Simulator

  • Retrograde motion: earth-centered and sun-centered explanations

  • Retrograde motion: Sun-centered explanation II

  • Details of epicycles, eccentrics, and equant points

  • General link to lots of good demos.

  • Smoke in Space, by Aaron Harrington

  • Picture of the Hubble Space Telescope

  • The Hubble Deep Field -- External Links

  • The Hubble Deep Field -- Local Link

  • Another beautiful picture

  • Inventing Reality's own Sam Singer dedicates the new NS telescope with Greg Prince

  • The School of Athens, by Raphael, ~1510.

  • The Keck Telescope

  • Ptolemaic Astronomy:Introduction , Instructions , and a Simulation demonstrating the use of epicycle, deferent, equant point, and eccentric.

  • The Mysterious Fate of the Great Library of Alexandria

  • The Middle finger of Galileo's right hand

  • The Phases of Venus

  • Kepler's Laws Demonstration

  • Kepler's Laws Demonstration 1

  • Kepler's Laws Demonstration 2

  • Kepler's Laws Demonstration 3

  • Newton's Laws Demonstrations

  • Chinese Astrological Signs

  • Many physics demonstrations, including Newton's Laws

  • Prof. Judith's Young's Sunwheel in Amherst

  • Satellites viewable in the night sky, from Amherst

  • Great modern physics explanations and demonstrations

  • The inverse square law.

  • Waves Tutorial

  • Charles Messier

  • Fraunhofer lines in solar spectrum

  • When I Heard the Learned Astronomer, by Walt Whitman

  • Quote by Richard Feynman on beauty in science

  • The Doppler effect for sound

  • Doppler II

  • Geoff Marcy's Home Page, with links to Extrasolar Planet Detection and Women in Astronomy

  • The Large and Small Magellanic Clouds

  • New General Catalog (NGC) images

  • Picture of The Milky Way (our home)

  • Painting of what the Milky Way might look like if viewed from outside of it

  • A history of the Atom

  • Another history of the atom

  • Some neat optical illusions, just for fun.

  • The Michelson-Morley Experiment

  • The electromagnetic spectrum

  • Another electromagnetic spectrum web site.

  • Putting Relativity to the Test: The Einstein Cross

  • DeBroglie matter waves.

  • De Broglie's original papaer (translated)

  • A brief history of Einstein's Brain

  • Einstein's Brain: Details

  • An Explanation of Bell's Theorem

  • The Stern-Gerlach Experiment, Electron Spin, and Correlation Experiments

  • General Quantum Mechanics descriptions

  • The Many-Worlds Interpretation of Quantum Mechanics

  • The Myth of Sisyphus