Edwin Powell Hubble was an American astronomer. He played a crucial role in establishing the fields of extragalactic astronomy and observational cosmology. Hubble proved that many objects previously thought to be clouds of dust and gas and classified as "nebulae" were actually galaxies beyond the Milky Way.

What's the meaning of Hubble?

a heap; pile. a tumult; hubbub; uproar.

What is means of Hubble bubble?

1 : water pipe sense 2. 2 : a flurry of sound or activity : commotion.