Understanding the Evidence of an Expanding Universe

Explore Edwin Hubble's evidence for the expanding universe and learn about Hubble's Law in this insightful video.

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Edwin Hubble's observations were crucial in providing proof that the universe is expanding. He discovered that distant galaxies are moving away from us, and the farther they are, the faster they seem to be receding. This is known as the Hubble's Law. The phenomenon is observed through the redshift in the light from these galaxies, indicating they are moving away and stretching the wavelengths of the light they emit.

FAQs & Answers

  1. What is Hubble's Law? Hubble's Law states that the farther away a galaxy is, the faster it is moving away from us, which is crucial evidence of the expanding universe.
  2. How do scientists know the universe is expanding? Scientists observe the redshift in light from distant galaxies, which indicates they are moving away, supporting the theory of an expanding universe.
  3. Who discovered the expansion of the universe? The expansion of the universe was discovered by Edwin Hubble through his astronomical observations in the early 20th century.
  4. What is redshift in astronomy? Redshift is the phenomenon where light from distant galaxies is stretched to longer wavelengths, indicating they are moving away from us.

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