From:
Sir John Herschel
To:
the R.A.S.
Date:
[1846]
Source of text:
R.A.S.M.N., 7 (1847), 95-6 inc
Summary:
Reports dimming of Beta Ursae Minoris since ca. 1840. States that it is a slowly variable star.
Contributor:
John Herschel Project
Showing 1–2 of 2 items
Reports dimming of Beta Ursae Minoris since ca. 1840. States that it is a slowly variable star.
Accepts with thanks J. Henry Griesbach's drawings of solar spots. Encourages others to observe the sun. Suggests the use of photography in recording solar spots. Pledges to give the R.A.S. all JH's drawings of solar spots.