There are many more things we can learn using the Doppler Shift, and here is a summary of just a few: 1  We can measure the masses of binary stars, by detecting the velocity changes as they orbit around their common center of gravity, and combining these velocities with the period of the orbit.
Serendipity is when someone accidently finds something good. An example of serendipity is finding a twenty dollar bill in the pocket of a coat you haven't worn in awhile. YourDictionary definition and usage example.
Biological plausibility is an essential element of the intellectual background of epidemiology. The term originated in the seminal work of determining the causality of smoking-related disease (The Surgeon Generalâs Advisory Committee on Smoking and Health [1964]).