 | Astronomical Society of the Pacific - 1889 - 586 pages
...perhaps in a few seconds only — and each mapped out with unimpeachable accuracy. " I have not alluded to two important features in stellar photography....are much more perfect, and should do better still." * * * HARVARD COLLEGE OIISERVATORY, 1857, July 6. RELATION BETWEEN THE COLORS AND THE MAGNITUDES or... | |
 | J. B. Hearnshaw - 1996 - 542 pages
...magnitudes of the stars. The other point is, that the measurement of distances and angles of position of double stars from the plates, we have ascertained...are much more perfect, and should do better still [17]. Bond's letter to Mitchell shows he had a clear vision of the future potential of the new technique... | |
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I have forgotten to allude to two important features in stellar photography — one is that the. intensity and size of the images taken in connection with the length of time during which the plate has been exposed measures the relative magnitudes of the... 