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Can humans live on Planet X?

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New Horizons doesn't travel at a constant speed—however, I can still use an estimate of about 16 km/s (16,000 m/s). If this spacecraft targeted Planet Nine during its closest approach to the Sun, that would be a distance of about 200 AU (2.99 x 1013 m). read more

With special protective suits, I believe that we could, and probably in the not too distant future, will have people living on Mars. If Planet X does indeed exist, it is going to be a really long way from the sun, so is certainly going to be far too cold for humans to live on without spacesuits and/or special habitats designed to keep us alive. read more

If this spacecraft targeted Planet Nine during its closest approach to the Sun, that would be a distance of about 200 AU (2.99 x 10 13 m). Now we can use the standard definition for average velocity (in one dimension). read more

If Planet X does indeed exist, it is going to be a really long way from the sun, so is certainly going to be far too cold for humans to live on without spacesuits and/or special habitats designed to keep us alive. read more

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