The fall season officially begins on Monday, Sept. 22, 2025, with the autumnal equinox. An equinox occurs when the Earth's axis is tilted neither toward nor away from the sun, resulting in nearly ...
Earth wobbles on its axis like a spinning top, a motion called precession. This wobble takes about 26,000 years to complete one full circle. Different stars have served as the North Star throughout ...
On Sept. 22, the autumnal equinox, which signals the start of fall in the Northern Hemisphere, finally brings an end to our long, hot summer on Monday at 2:19 p.m. EDT. This happens at a precise ...
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No radio astronomy needed: Ring laser measures Earth's axis wobble with unprecedented precision
As Earth moves through space, it wobbles slightly. A team of researchers from the Technical University of Munich (TUM) and the University of Bonn has now succeeded in measuring these fluctuations in ...
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