hallo!!! wie gehts? i need new friends...but you can comment on this or just take the point ion really care lol.

Awww, I'm for sure down to talk anytime :)

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Thank you so much

Hey we can talk anytime we can be friends too

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how was your first day of school eevee?

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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)

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