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  1. Study with Quizlet and memorize flashcards containing terms like What is the difference between the whole universe and the observable universe?, How big is the observable universe?, how old is the whole universe? and more.

  2. The universe contains everything that exists including the Earth, planets, stars, space and galaxies. This includes all matter, energy, and even time. How big is the universe?

  3. Study with Quizlet and memorize flashcards containing terms like The universe is held together by..., Organize the structure of the universe from its smallest part to the largest..., What is the name of the theory that astronomers believe describes the origin of the universe? and more.

  4. a) After the universe reaches its expansion limit, gravity will pull it all back together b) The universe goes through infinite cycles of expansion and contraction. c) The universe is not only composed of the objects that we can see. d) The big bang actually never occurred, and the universe must have a different origin.

  5. A light-year equals the distance light can travel in one year’s time, about 10 trillion kilometers. A parsec is equal to 3.26 light-years. A mega parsec is 1 million parsecs. For which object would it make the MOST sense for scientists to use mega parsecs in describing its distance from Earth?

  6. Jan 16, 2024 · It’s a big, big universe out there, but for most of us our knowledge on the subject is vanishingly small. Sure, you’re probably familiar with our space-time origins in the Big Bang, and you may even know a little bit about the movement of galaxies and the omni-present cosmic background radiation filling all of know space.

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  8. Stars, Galaxies, and the Universe quiz for 8th grade students. Find other quizzes for Science and more on Quizizz for free!

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