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Ghost Particles Are Exposing Hidden Black Holes. They Just Won a Nobel Prize.
Season 12
Episode 2
17:28
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PBS Space Time
Will the Universe Expand Forever?
Throughout history, there has been much speculation about what the fate of the universe would be. Many theorized that the universe would eventually succumb to the pull of gravity, and reverse its expansion in what was being called ‘The Big Crunch.’ However, with the help of mathematical equations from Newton, Einstein, and Alexander Friedmann, we now have an answer.
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Challenge question: if 1kg of apples is $5 and 2kg is $10, how much is -1kg of apples?
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The hubble constant--the rate of expansion of our universe--has consumed astronomers.
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The foundations of quantum theory rests on its symmetries.
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Astronomers are the worst at naming things. Dark energy AND dark matter?
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What you think is a perfect reflection might be universe that is fundamentally different.
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Let me tell you a story about virtual particles. It may or may not be true.
