Edwin Powell Hubble, the American astronomer, demonstrated the existence of other galaxies besides the Milky Way.
Edwin hubble >:d
The energy of the cosmic microwave background is about 400,000 times less than the energy of all the stars and galaxies that ever existed. The CMB is the remnant radiation from the early universe, while the energy radiated by stars and galaxies have been accumulating over millions of years.
The universe has not existed in the same state for an infinite amount of time, that would be the steady state theory, which has been replaced by the big bang theory. The galaxies are moving away from each other because the universe is expanding at an increasing rate. It has been expanding since the big bang happened 13.7 billion years ago.
Mister Edwin Hubble did just that, before the 1920's, many astronomers thought that our galaxy included everyobject in space, in 1924 Edwin Hubble proved that other galaxies existed beyond the milky way
Edwin Hubble used Cepheid variable stars to measure the distances to galaxies. These stars have a relationship between their luminosity and pulsation period, allowing astronomers to calculate their distance based on their observed brightness.
Edwin Hubble
Edwin Hubble
Edwin Hubble.
Edwin Hubble
Eddie Hubble
Edward Hubble
Edwin hubble >:d
Edwin Hubble ;3
Edwin Hubble, after whom the space telescope was named.
Hubble.
Galileo
Edwin Hubble was responsible for the concept of the universe expanding.