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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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Season
Is an Ice Age Coming?
12:10
Matt looks at how the changes in our planet’s orbit and rotation impacts our climate.
Anti-gravity and the True Nature of Dark Energy
12:04
We’ve come a long way in our understanding of dark energy.
What Does Dark Energy Really Do?
9:50
How does dark energy affect the universe's expansion?
Why the Universe Needs Dark Energy
9:33
What's needed to determine the shape and geometry of our universe?
We Are Star Stuff
10:38
Stars are our stellar alchemists.
Will Starshot's Insterstellar Journey Succeed?
8:51
Starshot is an interstellar travel expedition unlike any other before it.
How Cosmic Inflation Flattened the Universe
10:17
The Big Bang Theory only gets us part of the way there.
Why is the Earth Round and the Milky Way Flat?
10:48
Our universe is not a very diverse place when it comes to shapes.
What’s Wrong With the Big Bang Theory?
9:56
We continue our search for a grand unifying theory of the Big Bang!
Why the Big Bang Definitely Happened
8:54
The actual moment of ‘the Big Bang’ is still a bit of a grey area within physics.
Should We Build a Dyson Sphere?
10:14
The Kepler telescope recently found a strange partial eclipse...possibly a Dyson Sphere.
LIGO's First Detection of Gravitational Waves!
7:29
Gravitational waves have officially been detected by LIGO!
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