Democritus Isaac Newton Galileo Galilei Anton Van Leeuwenhoek
In the 20th century, Edwin Hubble deduced from observations that there are galaxies other than the Milky Way. Hubble's observations depended on improvements in a technology first developed by which scientist?

Options:
- Democritus
- Isaac Newton
- Galileo Galilei
- Anton Van Leeuwenhoek

Galileo Galilei