In a blow for the hopes of antigravity machines, the first ever test of how antimatter responds to gravity confirms it falls down, not up
If you drop a piece of antimatter, it will fall down to the ground just like regular matter, according to the first ever measurement of how these strange particles are affected by gravity. While this rules out suggestions that antimatter could fall up, along with the existence of
and antigravity machines, there is still enough uncertainty in the measurement for there to be slight differences with regular matter and for new physics to be at play.identical in every way apart from an opposite electric charge. This flipped charge shouldn’t change how gravity affects the particle — all massive particles should move through space in the same way under gravity, according
. But it has been exceedingly difficult to test whether this is true because antimatter annihilates whenever it meets its opposite particle, making it hard to produce and store enough of it.at Aarhus University in Denmark and his colleagues have measured how gravity affects antihydrogen, which consists of an anti-electron, or positron, and an antiproton. While normal matter on Earth accelerates while falling at a rate of around 9.
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