Author: DAY (St. John Vincent)
Title: The Sun's Distance and Parallax; being a Paper read to the Philosophical Society of Glasgow, April 14, 1869.
Description: Edinburgh: Edmonston and Douglas, 1869. First edition, 16pp., original printed wrappers, a good copy. In astronomy, parallax is the only direct method by which distances to objects (typically stars) beyond the Solar System can be measured.

Keywords: Astronomy Science Pamphlet