Solar Halo May 2001
Explaination: A halo is a ring of light surrounding the Sun or moon. Most halos...
THE DANJON LIMIT OF FIRST VISIBILITY OF THE LUNAR CRESCENT
By Louay J. Fatoohi, F. Richard Stephenson & Shetha S. Al-Dargazelli Department of Physics, University...
Records for Young Moon Sightings
By Bradley E. Schaefer*, !mad A.Ahmadt and LeRoy Doggettt *NASA/Goddard Space Flight Center, Code 66I,...
Visibility of the lunar crescent
By Bradley E.Schaefer NASA/Goddard Space Flight Center, Code 661 Greenbelt, MD 20771, USA Prediction of...