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.
The noun brevity means shortness or conciseness. If you give a report on agriculture in the northern hemisphere in 3 minutes, you have done it with incredible brevity. Brevity comes from brevis, which means brief in Latin. You can use brevity for things that are literally short, like the brevity of an elevator meeting, or the quality of fleetingness, like the brevity of youth. Brevity is also a style of speaking or writing with economy.