why we need motion is space
Answers
Explanation:
Everything in the Universe is in motion because forces exist in the Universe. The gravitational force and the electromagnetic force ensure large objects are in motion while the weak and strong nuclear forces ensure the quantum world is constantly in motion. If there were no forces, there would be no motion.
The question of why there are forces in the Universe is currently unanswerable by science. They appear to be fundamental and demonstrable facts but there may not be an ultimate reason for their existence, just as there may not be a root cause for the existence of the Universe itself.
BRITANNICA
LOAD PREVIOUS PAGE
Star Populations And Movement
Stars and stellar populations
The concept of different populations of stars has undergone considerable change over the last several decades. Before the 1940s, astronomers were aware of differences between stars and had largely accounted for most of them in terms of different masses, luminosities, and orbital characteristics around the Galaxy. Understanding of evolutionary differences, however, had not yet been achieved, and, although differences in the chemical abundances in the stars were known, their significance was not comprehended. At this juncture, chemical differences seemed exceptional and erratic and remained uncorrelated with other stellar properties. There was still no systematic division of stars even into different kinematic families, in spite of the advances in theoretical work on the dynamics of the Galaxy.