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.
I once read a silly fairy tale, called 'The Three Princes of Serendip': as their highnesses travelled, they were always making discoveries, by accidents and sagacity, of things they were not in quest ofâ¦. Walpole's memory of the tale (which, as it turns out, was not quite accurate) gave serendipity the meaning it retains to this day. Origin and Etymology of serendipity from its possession by the heroes of the Persian fairy tale The Three Princes of Serendip