Answer: See explanation.
Explanation:
Because Astronomers have well-tested theoretical models that explain how a star evolves over the course of its life as well as well-tested theoretical models that explain how a star evolves over the course of its life.
I can think of one...
there is gravity pulling everything to the center of the earth, therefore the earth is spherical because gravity is equally distributed, pulling everything to Earth's center equally.
<span> Temperature. Hope this helps!</span>
The "Census Tract" is an area roughly equivalent to a neighborhood established by the Bureau of Census for analyzing populations. They generally encompass a population between 2,500 to 8,000 people. Bureau of Census describes them as "relatively permanent", but they do change over time.
