Rus·sell(rŭs′əl), Henry 1877-1957.
American astronomer who studied binary stars and developed methods to calculate their mass and distances. He also demonstrated the relationship between types of stars and their brightness.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.