High school
Finance & Accounting
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1. What would happen to Earth's orbit if the Sun became a black hole? A black hole is a region of space from which nothing, not even light can escape. A black hole is the fate of only the very largest of stars. The massive star as it uses its fuel rapidly and completely, and then it will die turning into a black hole.


The Sun is not massive enough to ever evolve into a black hole; it will end its life in about 4.5 billion years as a white dwarf star. But, in case if the Sun's mass was suddenly collapsed into a black hole then Earth's orbit then if a one solar mass black hole were to suddenly replace the Sun at the center of our solar system, the orbits of the planets would not change. This is because the physical laws that determine the orbital motion of the Earth depend only on the actual mass of the Sun, and not on whether it is distributed within a sphere (like the Sun) or at a point (like a black hole). 2. "There are 1011 stars in the galaxy. That used to be a huge number. But it's only a hundred billion. It's less than the national deficit! We used to call them astronomical numbers. Now we should call them economical numbers." —Richard Feynman, American physicist, Nobel Prize Laureate When we think of an astronomical number – we probably think of a sum that’s almost beyond human comprehension. We probably refer to huge numbers as astronomical because of the vast and seemingly infinite universe. But the universe may not be as big as it seems when compared to something like the national debt. This quote has been said towards the backhanded critique of government. ...
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