Question

The fact that all the planets orbit the Sun in the same direction is cited as support for the nebular hypothesis. Imagine that there's a different hypothesis in which planets can be created orbiting the Sun in either direction. Part A Under this hypothesis, what is the probability that eight planets would end up traveling in the same direction

Answer 1

The probability that eight planets would end up traveling in the same direction is 50%.

Number of planets that will orbit the sun

There are about 8 planets that will orbit the sun.

Current hypothesis

Under this hypothesis that the planets will orbit the sun in the different directions, the following methods can be used to determine the probability that eight planets would end up traveling in the same direction.

P (same direction) = 1 - P(8 planets different direction)

$P = 1 - \frac{1}{2} \\\\P = \frac{1}{2}$

Thus, the probability that eight planets would end up traveling in the same direction is 50%.

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