Ask The Universe

• Other Dimensions
  Other Dimensions

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  Are there extra dimensions? If so, could there be space trapped inside?

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• Can Antimatter Naturally Occur?
  Can Antimatter Naturally Occur?

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  Astrophysicist Alex Filippenko explores whether antimatter can naturally occur in the universe and explains what exactly a positron is.

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• Matter or Energy: Which is More Plentiful?
  Matter or Energy: Which is More Plentiful?

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  Which is more abundant in the universe, matter or energy?

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• What is the Volume of the Known Universe?
  What is the Volume of the Known Universe?

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  Ever wonder how immense the universe really is? Astrophysicist Alex Filippenko puts it in perspective.

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• What Put the Bang in the Big Bang?
  What Put the Bang in the Big Bang?

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  Find out what most physicists believe caused the "bang" when the universe came into being.

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• Faster Than Light Expansion
  Faster Than Light Expansion

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  Is it possible for the universe to expand faster than the speed of light, or would that violate Einstein's Theory of Relativity?

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• Where Do Quasars Originate?
  Where Do Quasars Originate?

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  Accelerating nearly as fast as the speed of light, where exactly do quasar jets form?

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• Exploding Star Chemicals
  Exploding Star Chemicals

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  Are heavy chemical elements produced by star explosions? If so, how do we know this?

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• Solar Eclipses
  Solar Eclipses

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  Will solar eclipses eventually become a thing of the past? If so, when?

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• What is a White Hole?
  What is a White Hole?

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  We've all heard of black holes, but what exactly is a white hole?

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• What is Dark Energy?
  What is Dark Energy?

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  What role does dark energy play in the universe? Astrophysicist Alex Filippenko describes a discovery that changed our understanding of how the universe works.

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• Age of The Universe
  Age of The Universe

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  The universe is approximately 14 billion years old, but how have scientists determined this number? Astrophysicist Alex Filippenko fills us in.

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• What Does "Expansion" Apply To?
  What Does "Expansion" Apply To?

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  Does the expansion of the universe apply to our bodies, Earth and the solar system? Astrophysicist Alex Filippenko explains.

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