Do this if you know german, don't answer if you don't du bist sehr dumm, steig aus dem stuhl etwas machen why do people live in antarctica a. its hot b. to colonize it c. produce a lot of plants d. the weather to train dragons e. e

answer:

because the gravitational attraction of our sun for the earth is the centripetal force causing the earth's circular motion around the sun, we can use netwon's law of universal gravitation to find the mass of the sun without ever actually visiting the sun. this is the same technique you would use to determine the mass of cygnus x-1 with a probe. the earth, orbiting the sun, plays the same role as the probe sent to orbit cygnus x-1.

f(force of gravity) = f(centripetal force)

explanation: