NHAS LogoNew Hampshire Astronomical Society

 

October 25th in Astronomy and Space Science
Discovery1671Italian-French astronomer Giovanni Cassini discovers Iapetus, a moon of Saturn.
Birth1877American astronomer Henry Norris Russell born. He discovered a correlation between spectral types and absolute magnitudes of stars, which is depicted in the Hertzsprung-Russell diagram. He was instrumental in developing an early theory of stellar evolution and was the first to study light from eclipsing binary stars to determine their masses. Russell also confirmed Cecilia Payne-Gaposchkin's discovery that the stars are composed mostly of hydrogen.
Unmanned Spaceflight1975The Soviet Venera 10 spacecraft lands on Venus and tramsmits data for 65 minutes including temperature, rock density, and wind velocity.
Home Page
Event Calendar
Newsletter
Library Telescope Program
NHAS Gear
Club Observatory
Skywatches
Contact Us
Join Us
Constitution & Bylaws
Neighboring Clubs
Member's Area (login required)
Annual Dues
Forums
YFOS Map
Club Assets

Officer's Area (login required)
NHAS Administration
©2014 New Hampshire Astronomical Society • P.O. Box 5823 • Manchester, NH 03108-5823