What should i write in the blank spaces?

it is hard for me to read that from the photo but you can always go to google and use a translate and type in the words and then whatever make sense to you put that in there in German or English etc.

Explanation:

sorry i did not give the actual answer (its hard to read off of that.)

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:

answer: what are the options for this question

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