Public
- Public
- Network
- Groups
- Popular
- People

Title page of "APPARENT VELOCITY-SHIFTS IN THE SPECTRA OF FAINT NEBULAE" by Milton Humason The abstract reads: Apparent velocity-shifts of the spectral lines of 46 extra-galactic nebulae have been observed at Mount Wilson, 9 of them by F. G. Pease. Most of these objects are fainter and more distant than any heretofore observed; approximately half of them are cluster nebulae. With one exception these observations confirm Hubble's velocity-distance correlation and provide numerical data which may be used in discussions of the significance of the red-shift of spectral lines. For all faint nebulae the displacements are large and toward the red, the maximum of the continuous spectrum shifting also.

Download link

Title page of "APPARENT VELOCITY-SHIFTS IN THE SPECTRA OF FAINT NEBULAE" by Milton Humason The abstract reads: Apparent velocity-shifts of the spectral lines of 46 extra-galactic nebulae have been observed at Mount Wilson, 9 of them by F. G. Pease. Most of these objects are fainter and more distant than any heretofore observed; approximately half of them are cluster nebulae. With one exception these observations confirm Hubble's velocity-distance correlation and provide numerical data which may be used in discussions of the significance of the red-shift of spectral lines. For all faint nebulae the displacements are large and toward the red, the maximum of the continuous spectrum shifting also.
https://files.mastodon.social/media_attachments/files/112/989/584/871/650/572/original/6d818bc7734fe87b.jpeg

Notices where this attachment appears

Robert McNees (mcnees@mastodon.social)'s status on Monday, 19-Aug-2024 16:17:28 UTC Robert McNees
in reply to

Humason had a knack for difficult measurements and became an expert at establishing the redshift of distant galaxies.
He measured the redshifts of over 600 galaxies, data that Hubble used in his work on the relationship between distance and radial velocity. Later measurements then supported Hubble's proposed relation.

In conversation about 3 months ago from mastodon.social permalink