A giant underground motion sensor in Germany tracks Earth’s wobbles
The machine’s measurements could help ensure the accuracy of GPS navigation
![Rotational Motions in Seismology](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/07/071720_MT_ROMY_feat.jpg?fit=1028%2C579&ssl=1)
The Rotational Motions in Seismology, or ROMY, is a giant motion sensor built into an underground bunker in Germany to measure tiny wobbles in Earth’s rotation.
J. Igel