Summary:
- The Earth's axis of rotation is not perfectly stable, but instead wobbles slightly over time. This is known as the "Chandler wobble."
- Traditionally, scientists have measured this wobble by observing the positions of stars in the sky. However, a new study has found a way to measure the Earth's wobble without looking at the stars.
- The researchers used data from GPS satellites to track changes in the Earth's orientation, providing a more direct and accurate way to measure the Chandler wobble over time.