• Images of Various Objects

  • Spectra of Two Objects

  • Twelve inch Schmidt-Cassagrain Telescope

  • Four Time Exposures of Galaxy M31 - The Andromeda Galaxy

  • Circular Diffraction Patterns

  • Resolution and Telescope Size (load Fourteen.swf)

  • Jupiter with "bad seeing" conditions

  • A Reflection Nebula seen at Three Different Angular Resolutions    (With telescopes identified)

  • Light Path for Refracting Telescope (load Thirteen.swf)

  • Chromatic Aberration Produced by a Lens

  • Refracting Telescopes

  • Light Path for Reflecting Telescope (load Thirteen.swf)

  • Spherical Aberration

  • The Schmidt Design using a Spherical Mirror

  • 5 m Hale and 10 m Keck Telescopes

  • The Hubble Space Telescope Being Deployed from the Shuttle in 1990

  • Nancy Roman, the Mother of Hubble

  • Keck & Hubble views of the Optical Afterglow of Gamma-Ray Burst 971214

  • The James Webb Telescope - Hubble's Successor

  • Comparisons bewteen Hubble and Webb:
        The Ring Nebula
        Deep Field of Galaxies
        NGC 1566 Spiral Galaxy from Hubble and Webb from APOD

  • The Transparency of the Earth's Atmosphere

  • The Chandra X-Ray Telescope

  • 100-meter Green Bank Radio Telescope in West Virginia

  • Very Large Array - Interferometry

  • EHT image of M87, from APOD