Astronomers have confirmed one of the weirdest properties of the universe: Some mysterious force is pushing galaxies apart at a faster and faster rate.
Graph shows the size of the cosmos over time as indicated by supernovas several billion light-years from Earth (white objects on right part of the curve) and the farthest known supernovas. If dust were dimming the nearby supernovas, the rate of expansion would fall instead along the orange dotted line.
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