English
English, 05.11.2020 19:50, hollis79

Read this excerpt from "Why Are They called Black Holes
In this excerpt, the author makes a connection between
a scientific theory and
After many millions or billions of years, the star runs out
of hydrogen and energy. Then the star "dies" and
collapses into a dense little ball with tons of gravity
Albert Einstein's theory of relativity predicted that black
holes would have to existit a dead star had enough
gravity. Using Einstein's theory, astronomers calculated
that if a star more than three times as heavy as our sun
died, the force of gravity pulling matter in could
overwhelm any other force pushing matter out
O the calculations that scientists make,
the beginning of a star's existence,
the idea that all things live and die
the question of why gravity exists.

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Read this excerpt from "Why Are They called Black Holes
In this excerpt, the author makes a c...

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