Multiple choice

Who discovered that our galaxy is only one of many?

  1. Edwin Hubble

  2. Galileo

  3. Aristotle

  4. George Washington Carver

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Edwin Hubble provided the observational evidence that the Andromeda Nebula was a separate galaxy, proving that the universe contains many galaxies beyond our own. This discovery fundamentally changed our understanding of the scale of the universe.