Doppler shift

Analysis of the Doppler shift of each spectrum also permits the evaluation of the velocity at each position.

Students can use the resulting dataset to learn basic processing tools and practice data visualization, using the Doppler shift to determine velocity, among other important lessons.

The distance of the galaxy yields its age—and its Doppler shift yields its velocity.

Doppler shifts in the spectra of glowing gases surrounding these black holes could reveal how fast they fling this material around—and thus how heavy they are.

One test is to see whether the signal’s frequency drifts over time: An alien transmitter would be on a moving planet, causing a Doppler shift.