Sunspots
Date
1671
Creator
Unknown, Artist
After
Robert Hooke (1635 - 1703, British) , Natural philosopher
Object type
Archive reference number
Manuscript page number
p107
Material
Dimensions
height (page): 360mm
width (page): 231mm
width (page): 231mm
Subject
Content object
Description
Small image on paper (H:43mm; W:32mm) pasted into the Register Book. The figure shows a sunspot (with one large spot and two smaller ones) observed on 1 September 1671 by Robert Hooke. It was printed in Philosophical Transactions vol. 6, no. 77.
Transcription
August the 30th 1671 I saw a larg spot in the center of the sun's face about noon, but had not then time to make any more exact observation thereof. September 1 1671. at three of the clock I saw the same spot moved about a quarter of the Diameter of the sun westward and it appeared of this forme exactly: that is, it consisted of one greater and two lesser black spots, with a dusky cloud encompassing them. The diameter of the whole Phaenomenon was about 1/72 part of the Diameter of the Sun, and it was distant from the next adjoining Limb18/72 that is, exactly one quarter of the diameter of the sun. This I examined and measured several times, and found very exact.
Transcribed by the Making Visible project
Transcribed by the Making Visible project
Object history
Printed in R. Hooke, 'Some spots in the sun, return'd after they had passed over the upper hemisphere of the sun which is bid from us, according as was predicted', Phil. Trans. vol. 6, no. 77 (November 1671), pp. 2295-3001 (p. 2295, woodcut).
Related fellows
Robert Hooke (1635 - 1703, British) , Natural philosopher
Associated place