A RELATION BETWEEN DISTANCE AND RADIAL VELOCITY AMONG EXTRA-GALACTIC NEBULAE

A RELATION BETWEEN DISTANCE AND RADIAL VELOCITY AMONG EXTRA-GALACTIC NEBULAE

January 17, 1929 | EDWIN HUBBLE
The spectrum of NGC 7619 resembles those of Milky Way clouds and W Ursae Majoris binary stars, with absorption line characteristics influenced by rapid stellar rotation. The shallow absorption lines in NGC 7619 are likely due to velocity dispersion and spectral blending in its central stars. The absorption is weak in smaller, fainter nebulae. Hubble's study examines the relationship between distance and radial velocity among extragalactic nebulae. Distances are estimated using absolute luminosity criteria, such as Cepheid variables and blue stars. The study finds a linear correlation between distance and radial velocity, suggesting a new solution for solar motion where velocities vary directly with distance. The results indicate a possible de Sitter effect, influencing discussions on space curvature. The data show a linear velocity-distance relation, with new data expected to refine these findings. The results support the validity of the velocity-distance relation, with NGC 7619's velocity of 3910 km/sec corresponding to a distance of 7.8 million parsecs. Future data may confirm or modify these conclusions.The spectrum of NGC 7619 resembles those of Milky Way clouds and W Ursae Majoris binary stars, with absorption line characteristics influenced by rapid stellar rotation. The shallow absorption lines in NGC 7619 are likely due to velocity dispersion and spectral blending in its central stars. The absorption is weak in smaller, fainter nebulae. Hubble's study examines the relationship between distance and radial velocity among extragalactic nebulae. Distances are estimated using absolute luminosity criteria, such as Cepheid variables and blue stars. The study finds a linear correlation between distance and radial velocity, suggesting a new solution for solar motion where velocities vary directly with distance. The results indicate a possible de Sitter effect, influencing discussions on space curvature. The data show a linear velocity-distance relation, with new data expected to refine these findings. The results support the validity of the velocity-distance relation, with NGC 7619's velocity of 3910 km/sec corresponding to a distance of 7.8 million parsecs. Future data may confirm or modify these conclusions.
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