Physics for IGCSE & O level - The Earth In Space (Section 1 - No. 7)
What is the primary scientific contribution attributed to Edwin Hubble concerning the universe?
Discovering the composition of stars.
Identifying the first black hole.
Demonstrating the expansion of the universe.
Formulating the theory of relativity.
Explicació
Hubble's observation of redshift in distant galaxies provided evidence for expansion.