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Massive objects beyond the frost line are likely giant planets. Let's talk about the frost line, which you helpfully specified (3.94 AU). For anyone not familiar with the term, the frost line is t...
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#1: Attribution notice removed
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System
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2020-06-01T14:13:55Z (over 4 years ago)
Source: https://worldbuilding.stackexchange.com/a/116104 License name: CC BY-SA 4.0 License URL: https://creativecommons.org/licenses/by-sa/4.0/