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20 POINTS

Which two adjacent planets have the largest distance between them?
Which two adjacent planets have the smallest distance between them?
What is the general pattern of the planetary distances from the sun?
Which planet has the longest day?
Which planet has the longest year?
Explain why the outer planets have a lower density than the inner planets.

Here's the answer for the pattern:

Explanation:

Mercury is 1.8 times as far away from the Sun as Venus, and Earth is 1.4 times as far away as Venus. Mars is 1.5 times the distance between Earth and Mars. Each planet may be between 1.4 and 1.8 times farther from the sun than its "inside" neighbor, according to this trend. And there's the issue of Jupiter's distance from the sun, which is 3.4 times that of Mars.