Spacecraft carrying ultraprecise atomic clocks could help uncover the identity of the invisible and mysterious substance.
closer to the sun than any other spacecraft had gone before. In 2021, the probe flew across the sun's corona — its ultrahot upper atmosphere — for the first time, and it continues to circle closer and closer to our star.
Leading candidates for dark matter include ghostly ultralight particles. For instance, a hypothetical particle known as an axion may have a mass less than a billionth of an electron's. Theoretical physicists originally proposed the existence of"If this kind of dark matter exists, you can imagine that we are basking in waves of dark matter," Tsai said.
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