New Way To Measure Speed Of Stars - PNAS 2022
PNAS202122586_proof.pdf Astronomers uncover newway tomeasure the speed of stars Ken Croswell, Science Writer As an ambulance speeds toward you, its sirens scream at a high pitch. That pitch suddenly drops when the vehicle rushes by and races away. The change in pitch arises from a well-known phenome- non called the Doppler shift. However, the effect is more than just an amusing oddity. For more th