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Determine the orbital radius for the extrasolar planets

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Determine the orbital radius for the extrasolar planets x and y. Answers should be in astronomical units.

The planets are orbiting two stars with the same mass as our sun (1.9891 x 10^30kg). The planets are in two separate solar systems.

There are no other planets in either system and both stars are at a distance of 1000pc from earth.

planet X
mass/Me 12

Radius of stars orbit from centre of mass of the system/km 2 x 10^4

Orientation of the system - face on

Planet Y

Mass/Me 150

Radius of stars orbit from centre of mass of the system/km 2 x 10^3

Orientation of the system - edge on

2. Which extrasolar planet detection technique would be appropiate/inappropiate for each planet. Explain why

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The expert determines the orbital radius for the extrasolar planets.

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