stars2 {lmreg}

Stars data 2

Description

Distance of additional galactic objects from Earth and their velocities (Humason, 1936).

Usage

data(stars2)

Format

A data frame with 21 observations on the following 2 variables.

Distance

Distance from Earth (in million parsec; 1 parsec = 3.26 light years)

Velocity

Velocity of Galaxy (in km/s)

Details

The galactic objects in this data set are much further away from Earth than those in the data set stars1.txt. These became available within a few years of the publication of Hubble's original work, through rapid advancesment in technology. Although the new data cemented Hubble's hypothesis that distant objects have proportionately higher velocity (as they should in a universe expanding with constant acceleration), the constant of proportionality turned out to be somewhat different from Hubble's original estimate.

Source

Humason, M.L. (1936) The apparent radial velocities of 100 extra galactic nebula. Astrophys. J. 83, pp.10-22.

Examples

data(stars2)
head(stars2)