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We know there is gravity because apples fall from trees. We can observe gravity in daily life. If we could throw an apple to the edge of the universe, we would observe it accelerating.

Adam Riess

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Adam Riess
Age: 54
Born: 1969
Born: December 16
Astronomer
Astrophysicist
Physicist
Professor
University Professor
Washington
District of Columbia
Adam Guy Riess
Life
Edges
Trees
Throw
Accelerating
Daily
Apple
Tree
Observe
Universe
Gravity
Fall
Apples
Would
Edge

More quotes by Adam Riess

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Dark energy is incredibly strange, but actually it makes sense to me that it went unnoticed, because dark energy has no effect on daily life, or even inside our solar system.
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We're really just the frosting on a cake and we don't know what's inside the cake.
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I think the mystery of what's out there in the universe is just very compelling.
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Until the 1990s, there were few reliable observations about movement at the scale of the entire universe, which is the only scale dark energy effects. So dark energy could not be seen until we could measure things very, very far away.
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It's everywhere, really. It's between the galaxies. It is in this room. We believe that everywhere that you have space, empty space, that you cannot avoid having some of this dark energy.
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Your chemistry high school teacher lied to you when they told you that there was such a thing as a vacuum, that you could take space and move every particle out of it.
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