twilightmoon777
New member
Here are the questions I'm given...
I have no idea where to began...
Since every reaction has an equal and opposite reaction, we can derive the motions of the sun (the opposite reaction) by assuming that the motion will be proportional to the ratio of the masses of the planet and Sun. In other words - v(sun) = v(planet) * m(planet)/M(sun). Using this information, derive an approximate estimate of the motions of the Sun caused by the reaction force to the planetary orbits.
Which planet is our solar system causes the largest Doppler shift of our Sun that an alien astronomer might observe? Consider the cases of Mercury, Earth, and Jupiter. How do these Doppler shifts compare to our current technology limit of about 1m/s? What do this tell you about detecting planets around our stars?
Anyway help is well appreciated, thanks!
I have no idea where to began...
Since every reaction has an equal and opposite reaction, we can derive the motions of the sun (the opposite reaction) by assuming that the motion will be proportional to the ratio of the masses of the planet and Sun. In other words - v(sun) = v(planet) * m(planet)/M(sun). Using this information, derive an approximate estimate of the motions of the Sun caused by the reaction force to the planetary orbits.
Which planet is our solar system causes the largest Doppler shift of our Sun that an alien astronomer might observe? Consider the cases of Mercury, Earth, and Jupiter. How do these Doppler shifts compare to our current technology limit of about 1m/s? What do this tell you about detecting planets around our stars?
Anyway help is well appreciated, thanks!