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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.

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  Adam Riess
Tags: Think  Universe  Mystery  Just  I Think 

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Author introduction

Adam Guy Riess (born December 16, 1969) is an American astrophysicist and Bloomberg Distinguished Professor at Johns Hopkins University and the Space Telescope Science Institute and is known for his research in using supernovae as cosmological probes. Riess shared both the 2006 Shaw Prize in Astronomy and the 2011 Nobel Prize in Physics with Saul Perlmutter and Brian P. Schmidt for providing evidence that the expansion of the universe is accelerating.

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One of the most exciting things about dark energy is that it seems to live at the very nexus of two of our most successful theories of physics: quantum mechanics, which explains the physics of the small, and Einstein's Theory of General Relativity, which explains the physics of the large, including gravity.

    Adam Riess  Adam Riess   
 Tags: Live Energy Small Dark Physics Two
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During my time at Watchung Hills Regional High School, I was fortunate to have a number of teachers who inspired me and filled me with enthusiasm for learning.

    Adam Riess  Adam Riess   
 Tags: Learning Time School Me High School
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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.

    Adam Riess  Adam Riess   
 Tags: Energy Universe Measure Dark Only
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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.

    Adam Riess  Adam Riess   
 Tags: Life Daily Me Energy Dark Strange
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Einstein wrestled with a problem back before we even knew the universe was expanding, and he was looking for a way to keep the universe from collapsing. And so he discovered, in his theory of gravity, something like this dark energy - he called it a cosmological constant - could play this role, pushing things away.

    Adam Riess  Adam Riess   
 Tags: Energy Looking Universe Problem Dark
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We look at distant exploding stars called supernovae, and we've developed techniques to measure how far away they are and how fast they're moving away from us.

    Adam Riess  Adam Riess   
 Tags: Stars Moving Measure Look Fast Us
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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.

    Adam Riess  Adam Riess   
 Tags: Teacher School Space High School You
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I think the mystery of what's out there in the universe is just very compelling.

    Adam Riess  Adam Riess   
 Tags: Think Universe Mystery Just I Think
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