In the 1920s Edwin Hubble looked at the Spectra of the stars from distance galaxies to his surprise he found that all of the specters were red shifted and that the more distant galaxies the greater the red what is a reasonable conclusion for this evidence the universe is expanding universes contraction in the universe has changed in the universe the universe is curved

Answer 1

Edwin Hubble's observations of redshift in the spectra of distant galaxies led to several key conclusions about the nature of the universe. The most reasonable conclusion from Hubble's findings is that the universe is expanding.

Hubble discovered that the light from more distant galaxies was redshifted, meaning that those galaxies were moving away from us. Furthermore, he found a correlation between distance and redshift: the farther away a galaxy is, the faster it appears to be receding. This relationship is encapsulated in what is now known as Hubble's Law, which supports the idea that the universe has been expanding since the Big Bang.

The other options—universe's contraction, changes in the universe, and curvature—did not appropriately describe the implications of Hubble's findings at that time. In summary, Hubble's observations fundamentally changed our understanding of the universe by providing evidence for its expansion.