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From What We Can See, How Much of It Makes Up the Universe

Everything you've seen in the Universe makes up less than 5% of what’s out there in the Universe. Scientists know this because the Universe is accelerating faster. As we expand, so does the Universe.

Are We Alone in the Universe? ·

Science Rules! with Bill Nye

More from this episode

  1. Why Should We Care About Where We Come FromAccording to Dr. Janna Levin, we should care because we should know where we are in the cosmic scheme of things.
  2. How Do We Know the Universe Is 13.8 Billion Years OldDr. Levin states that scientists predict how hot the remaining light that the Bing Bang is, which involve the laws of physics.
  3. What Does Looking at the Galaxy Reveal to UsIt reveals that the further away you look at a galaxy, the faster it must be moving away from you. This is known as Hubble’s Law.
  4. Can We Accurately Measure the Size of the UniverseNo. Dr. Levin states that we can’t estimate the size of the actual Universe. In fact, we may never know.
  5. Is There More Than One UniverseIt’s unanswerable. We may never be able to see that deep into space to know.
  6. Can You Have Multiple Infinite UniversesYes. As we’re visualizing it from the limitations of our human minds, we’re imagining this being nested in a higher dimension of space.
  7. Is There a Way to Tell If We Are Living in a Holographic UniverseIt’s not impossible. One of the ways scientists conclude this is by thinking of black holes. Basically, nothing can be more compact than a black hole.
  8. What Would Happen If the Universe Didn't Recycle MaterialSay the Universe made stars, and the stars had thermonuclear explosions and made heavier elements— which are all the stuff for life.
  9. What Is a Known Form of Invisible MatterNeutrinos are dark matter particles that doesn’t interact with light or atoms, which is why they can go through us.
  10. What Is String TheoryIt’s an idea that there is one fundamental law of physics.
  11. What Does Every Particle in the Universe HaveEvery particle has a field component and a particle component.
  12. Is It Possible to Travel to the PastIn Einstein’s Theory of General Relativity, it is possible.
  13. What Is One of the Most Common Misconceptions About SpaceIn Janna Levin’s view, it’s the point that space expands into other space. In a sense, it’s a meaningless question.
  14. What Is One Thing We Should All Know About SpaceTo sum it up: Wow.

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