“A New Method of Determining Distances to Galaxies”

Target entity: “A New Method of Determining Distances to Galaxies”
Context triple: [J. Richard Fisher, coAuthorOf, “A New Method of Determining Distances to Galaxies”]

• A. Hubble–Humason galaxy redshift measurements
  The Hubble–Humason galaxy redshift measurements are a landmark set of observations that extended and refined Edwin Hubble’s work on the expanding universe by systematically measuring the redshifts of distant galaxies.
• B. A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae
  "A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae" is Edwin Hubble’s landmark 1929 paper that established the linear relationship between galaxies’ distances and their recessional velocities, providing the first strong evidence for the expanding universe.
• C. Tully-Fisher relation distances
  Tully-Fisher relation distances are galaxy distance measurements derived from the empirical correlation between a spiral galaxy’s luminosity and its rotational velocity.
• D. Tolman surface brightness test
  The Tolman surface brightness test is an observational cosmology method that checks whether the universe is expanding by examining how the surface brightness of distant galaxies diminishes with redshift.
• E. Hubble sequence of galaxy classification
  The Hubble sequence of galaxy classification is a morphological system that organizes galaxies into categories such as ellipticals, spirals, and irregulars based on their visual appearance.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: “A New Method of Determining Distances to Galaxies”
Target entity description: “A New Method of Determining Distances to Galaxies” is a scientific paper that presents an innovative technique for measuring the distances to external galaxies, contributing to more accurate extragalactic distance scaling in astronomy.

• A. Hubble–Humason galaxy redshift measurements
  The Hubble–Humason galaxy redshift measurements are a landmark set of observations that extended and refined Edwin Hubble’s work on the expanding universe by systematically measuring the redshifts of distant galaxies.
• B. A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae
  "A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae" is Edwin Hubble’s landmark 1929 paper that established the linear relationship between galaxies’ distances and their recessional velocities, providing the first strong evidence for the expanding universe.
• C. Tully-Fisher relation distances
  Tully-Fisher relation distances are galaxy distance measurements derived from the empirical correlation between a spiral galaxy’s luminosity and its rotational velocity.
• D. Tolman surface brightness test
  The Tolman surface brightness test is an observational cosmology method that checks whether the universe is expanding by examining how the surface brightness of distant galaxies diminishes with redshift.
• E. Hubble sequence of galaxy classification
  The Hubble sequence of galaxy classification is a morphological system that organizes galaxies into categories such as ellipticals, spirals, and irregulars based on their visual appearance.
• F. None of above. chosen