Big Think 2017 Top Ten: #9. Neil deGrasse Tyson on Dark Matter
Don't believe the dark matter hype! Neil deGrasse Tyson breaks down the fundamental thing we all need to understand about the most mysterious matter in the ...
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The question isn't about whether dark matter exists or not. What's going on is, when we measure gravity in the universe—the collective gravity of the stars, the planets, the moons, the gas clouds, the black holes, whole galaxies—when we do this, 85 percent has no known origin. So it's not a matter of whether dark matter exists or not, it's a measurement—period. Now, “dark matter” is not even what we should be calling it because that implies that it is matter; it implies we know something about it that we actually don't. So a more precise labeling for it would be “dark gravity.” Now, if I called it dark gravity, are you going to say: “Does dark gravity really exist?” I'd say yeah, because 85 percent of the gravity has no known origin. There it is. ...
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The question isn't about whether dark matter exists or not. What's going on is, when we measure gravity in the universe—the collective gravity of the stars, the planets, the moons, the gas clouds, the black holes, whole galaxies—when we do this, 85 percent has no known origin. So it's not a matter of whether dark matter exists or not, it's a measurement—period. Now, “dark matter” is not even what we should be calling it because that implies that it is matter; it implies we know something about it that we actually don't. So a more precise labeling for it would be “dark gravity.” Now, if I called it dark gravity, are you going to say: “Does dark gravity really exist?” I'd say yeah, because 85 percent of the gravity has no known origin. There it is. ...
