The microwave-sized sensor detects 'spectral fingerprints' of important minerals.

60,000 feet above Earth, NASA is hunting for the minerals that power phones, EVs and clean energy

Source: space
Source Link: https://www.space.com/astronomy/earth/60-000-feet-above-earth-nasa-is-hunting-for-the-minerals-that-power-phones-evs-and-clean-energy