Listen to the lecture and describe how galaxies form and evolve.

 

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7 Responses

  1. Marbea

    The professor discusses how galaxies form and evolve. She says that galaxies evolve over billions of billions of years, for that reason scientists use the relationship between the distance that light travel over time. Therefore, scientists compare what they see today and what they saw before. They saw closer cluster of galaxies containing 100 million stars. Other distant galaxies form spirals with bright points that are star-forming complexes. She also says that scientists use computer simulation to demonstrate that clumpy galaxies became spiral galaxies in billion of years.
    And that is how the professor explains how galaxies form and evolve.

    Reply
  2. Marbea

    The professor discusses how galaxies form and evolve. She says that galaxies evolve over billions of billions of years, for that reason scientists use the relationship between the distance that light travel over time. Therefore, scientists compare what they see today and what they saw before. They saw closer cluster of galaxies containing 100 million stars. Other distant galaxies form spirals with bright points that are star-forming complexes. She also says that scientists use computer simulation to demonstrate that clumpy galaxies became spiral galaxies in billion of years.
    And that is how the professor explains how galaxies form and evolve.

    Reply
  3. schroder

    Hey, I am still beginning, but please rate hard … only then I can learn 🙂

    Reply
  4. preyksha

    My answer to the TOEFL Speaking question.

    Reply
  5. arastoo1988

    My answer to the TOEFL Speaking question.

    Reply
  6. Aparajita

    My answer to the TOEFL Speaking question.

    Reply

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