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A simple answer is that the planet is on an orbit with a high inclination relative to our line of sight. The other planets in the system may appear, from our perspective, to be in line with us and ...
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System
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2020-06-01T14:13:59Z (over 4 years ago)
Source: https://worldbuilding.stackexchange.com/a/169479 License name: CC BY-SA 4.0 License URL: https://creativecommons.org/licenses/by-sa/4.0/