Skip navigation
Skyscrapers, Inc.
  • Explore
  • Visit
  • Join
Sky Data

Sky Data

June 11, 2026   00:41 EDT   4:41 UT   Conditions at Seagrave Observatory
SunMoon
Rise5:1102:10Moon Phase25.9d
Set20:2116:3614.4%
  • Clear Sky Forecast: Clear Sky Forecast
  • The Evening Sky Map
  • Heavens Above   ISS & Satellite Predictions
  • SpaceWeather.com   News & Information about the Sun-Earth Environment
  • About Skyscrapers
    • Overview
    • Seagrave Memorial Observatory
    • AstroAssembly
    • History
    • Officers & Committees
    • Membership
    • Constitution & Bylaws (PDF)
    • Nominations & Elections (PDF)
  • News & Events
    • Events Calendar
    • Monthly Meetings
    • Public Observing Nights
    • Newsletter
    • From the President
    • Observing Reports
  • Resource Library
    • Skyscrapers Archive
    • Photo Gallery
  • Explore
    • The Sky This Month
    • Meteor Showers
    • Stars & Constellations
    • Variable Stars
    • Double Stars

The Objective of the 20" Alvan Clark

September 2003 | By Rick Lynch
The Objective of the 20 Jim Hendrickson and Dan Lorraine examine diffraction gratings that were placed over the objective of the telescope.

See Also

2003 Skyscrapers Trip to Van Vleck Observatory
RSS Twitter Facebook
Tweet

The name of this Society shall be “Skyscrapers, Inc. (Amateur Astronomical Society of Rhode Island).” The object of this Society shall be to educate the general public and membership on matters pertaining to astronomy. It shall be an educational, nonprofit organization. This Society is incorporated as a non-business corporation under the laws of the State of Rhode Island.