Should we travel a second back in time to fix our planet's speedy spins?
NASA JohnsonEarth itself can claim a new world record: Scientists studying our planet’s rotation confirmed that June 29 was the. As Earth completes one full rotation on its axis, the speed of the spin—nearly 24 hours, with tiny fluctuations—determines our length of day. But on June 29, Earth spun a bit faster than normal, shortening our day by 1.59 milliseconds.
The news is historic but unsurprising. Since the 1960s, astronomers have been using atomic clocks to record Earth’s rotation. In 1987, the International Astronomical Union and the International Union of Geodesy and Geophysics established theto monitor Earth’s rotation and maintain global time. But in recent years, they have observed a peculiar pattern. Earth’s spin is getting faster. In 2020, our planet had the 28 shortest days on record—on July 19, 2020, midnight came 1.
2022 is shaping up to be speedy, too. June 29 wasn’t the only day to whirl by unusually fast. On July 26, the planet reached midnight 1.50 milliseconds ahead of schedule. And the planet may break that record again in the near future if it keeps spinning faster.Why is Earth in a hurry? Astronomers still don’t have an answer to this question, but they do have some theories.
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