From:
Sir John Herschel
To:
Caroline Lucretia Herschel
Date:
[22 May 1831]
Source of text:
TxU:H/L-0576.3; Reel 1058
Summary:
Has determined the periods of four double stars. JH considers the determination of the elliptical orbits of double stars as 'one of the greatest [discoveries] ever made.'
Contributor:
John Herschel Project