09:33
PBS Space Time
Life on Europa?
New findings have increased the likelihood that there is a vast ocean lying under Europa.
Why the Universe Needs Dark Energy
PBS Space Time explores the outer reaches of space, the craziness of astrophysics, the possibilities of sci-fi, and anything else you can think of beyond Planet Earth. Host Matt O'Dowd breaks down both the basic and incredibly complex sides of space and time.
Why the Universe Needs Dark Energy
Season 2 Episode 27 | 9m 33s | CC
We know the universe will continue to expand forever, so now we can begin to complete the first Friedmann equation, and determine the shape and geometry of our universe. At first glance, it would seem that the equation doesn’t quite add up, and that our universe is a hyperbolic plane. But when we add in the cosmological constant, the equation balances out, and we return to a flat universe.
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