GK
SOLAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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There are a few galaxies and all of them are moving towards each other.
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Galaxies are moving away from each other.
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The Milky Way galaxy IS the universe.
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Hubble did not discover any evidence to support this theory.
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Detailed explanation-1: -Hubble’s brilliant observation was that the red shift of galaxies was directly proportional to the distance of the galaxy from earth. That meant that things farther away from Earth were moving away faster. In other words, the universe must be expanding. He announced his finding in 1929.
Detailed explanation-2: -The Doppler effect doesn’t just apply to sound. It works with all types of waves, which includes light. Edwin Hubble used the Doppler effect to determine that the universe is expanding. Hubble found that the light from distant galaxies was shifted toward lower frequencies, to the red end of the spectrum.
Detailed explanation-3: -Hubble Eventually Did Not Believe in Big Bang: Associated Press | Science 2.0. Edwin Hubble’s observation about the spectral redshift from nearby “nebulae” (galaxy < 10 Mpc), published in 1929 got interpreted in terms of an “Expanding Universe” and eventually the “Big Bang Model”.