Blue stragglers are created by the merger of two low-mass stars. But they have two different views of how these stars interact to create blue stragglers. One merger theory proposes that a violent collision of two unrelated stars creates a blue straggler. Another hypothesizes that a slow coalescence of a gravitationally bound pair creates the straggler star.

#science #sciencefacts #bluestragglers #bluestragglerstar #stars #collision #Coalescence

https://hubblesite.org/contents/news-releases/1997/news-1997-35.html

#Coalescence - The act or state of growing together, as similar parts; the act of uniting by natural affinity or attraction; the state of being united; union; concretion.

Searching for a good non-technical introductory book about human population #genetics ? The 2017 book by Adam Rutherford is rich in anecdotes, very entertaining, lively, and written in an engaging style. I greatly enjoyed reading it. #science #biology #gene #coalescence #race #racism #consanguinity #evolution #human
📄 Rutherford A (2017) A brief history of everyone who ever lived: the human story retold through our genes. The Experiment, New-York