Edwin Hubble found out that what appeared to be large clouds in space were not gas, but GALAXIES (Option A).
- Edwin Hubble was an American astronomer who demonstrated that objects previously believed to be clouds of gas (previously known as 'nebulae') were galaxies.
- A galaxy can be defined as a system of stars held together by gravitational forces.
- The Milky Way is the galaxy that includes our Solar System.
- According to their organization, galaxies can be classified as spiral, elliptical, peculiar, and irregular.
In conclusion, Edwin Hubble found out that what appeared to be large clouds in space were not gas, but GALAXIES (Option A is correct).
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