Hubble 1929: distance and velocity of 24 nebulae

Table 1 of Hubble (1929), the data of the first velocity–distance relation: the distance and radial velocity of 24 extra-galactic nebulae. The least-squares line through the origin gives K = 424 km/s per million parsecs; Hubble used about 500.

Usage

df_cosmology_hubble1929

Format

A tibble with 3 columns and 24 rows

object

Nebula: "SMC" and "LMC" (Hubble's "S. Mag." and "L. Mag."), then NGC numbers

r_mpc

Distance in million parsecs

v_kms

Radial velocity in km/s (negative: approaching)

Source

Hubble E. (1929), "A relation between distance and radial velocity among extra-galactic nebulae", Proceedings of the National Academy of Sciences 15(3): 168–173, doi:10.1073/pnas.15.3.168