Jupit

You, on other worlds

What a bathroom scale would read if you carried it round the solar system, and how many of each planet’s years you have lived. The scale survives. It is that kind of scale.

70 kg (154 lb)
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Mercury26 kg
Venus63 kg
Earth70 kg
Moon12 kg
Mars27 kg
Jupiter185 kg
Io13 kg
Europa9.4 kg
Ganymede10 kg
Callisto8.9 kg
Saturn80 kg
Uranus64 kg
Neptune80 kg
Pluto4.4 kg

Your mass stays the same everywhere, so nobody is being rude. What changes is how hard each world pulls on it, which is what a scale measures. The giant planets have no surface, so their figures are the average at the cloud tops; a fast spin makes you lighter at the equator and heavier at the poles, and on Jupiter the equator figure is about a tenth lower. Earth birthdays follow the calendar; the other worlds count whole trips round the Sun. Ages follow the site clock, so winding it forward shows your birthdays arriving. Gravity and year lengths are from NASA’s planetary fact sheets.