• tetris11@lemmy.ml
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    7 months ago

    The sun would be the natural parent coordinate system of Mars, Earth, and (grandparent of) The Moon. So I see her centered on either Earth, the Sun, the Centre of the Milkway, Centre of the Local Group, etc. etc.

    The speed at which she drifted through the wall wasn’t on level of thousands of km’s per second, it was on the order of a few meters per second.

    This would admittedly rule out the Sun, since the Earth has an orbital speed of 29 km/s around the sun[1], and a spin velocity of 0.5 km/s[2], giving a minimum of 28 km/s. If we factor in orbit of the sun from the Galactic Centre at 240 km/s, giving 240 +/ 29, which is still too high for our range. If we factor in the speed of the Galaxy, then we’re just adding more zeroes.

    What about the moon or Mars?

    So, to come full circle on my comment: Yeah maybe, the relative speed of moon and Mars would be on the order of meters per second that we see in the panel. I just don’t see why they of all planetary bodies would be chosen for ghosts, instead of other natural origins.

    1: https://en.wikipedia.org/wiki/Earth's_orbit
    2: https://en.wikipedia.org/wiki/Earth's_rotation#Angular_speed
    3: https://www.universetoday.com/133414/distance-speed-suns-orbit-around-galactic-centre-measured/

    • InputZero@lemmy.ml
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      7 months ago

      Yeah I thought that too, if the spirit isn’t gravitationally bound earth would move away from it considerably faster. This did get me to ask myself a good question. (This isn’t it) What if we assume the spirit in the comic is dark matter and preserved any momentum at the time of death? So Earth’s gravity is pulling on it but not enough to overcome the momentum the spirit had when it broke off from the body. The Sun and Earth could be special in that constructed situation. The question I thought was, does the electromagnetic, strong and weak forces have anything to do with keeping me planted on the planet?