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Nebulae data from Freedman (2001)

Source: R/datasets.R
hubble2.Rd

Data that are an update to the Hubble (1929) hubble data. Contains estimates of the distance from Earth and the velocity relative to Earth of 24 nebulae.

Usage

hubble2

Format

A data frame with 24 observations on the following 2 variables.

  • distance: the distance, in megaparsecs, of the nebula from Earth.

  • velocity: the velocity, in kilometres per second, of the nebula relative to Earth.

Source

The velocity values are from column 7 of Table 5 of Freedman (2001) and the distance values are the corresponding values from Table 4.

References

Freedman et al. (2001) Final results from the Hubble space telescope key project to measure the Hubble constant. The Astrophysical Journal, 553, 47-72.