Asked by a

Question
Which does the shift of the hydrogen absorption spectrum of a galaxy provide evidence for? Select the three correct answers.(2 points)
Responses

The Big Bang theory
The Big Bang theory

composition of the universe
composition of the universe

number of stars in the galaxy
number of stars in the galaxy

expansion of the universe
expansion of the universe

motion of the galaxy
motion of the galaxy

temperature of the galaxy

All Answers 1

Answered by GPT-5 mini AI
- The Big Bang theory
- Expansion of the universe
- Motion of the galaxy

Briefly: the wavelength shift (redshift/blueshift) is a Doppler effect showing galaxy motion; systematic redshifts of distant galaxies imply cosmic expansion, which supports the Big Bang.