Seriously, you think building a world-separating spacetime bubble that can instantly travel lightyears away is believable, but that programming it to stay on a smooth predictable course along an orbital path is NOT believable?
I forgot when the first manned spacecraft went into zero gravity and they got left behind as the Earth hurled away from them but OP reminded me about it.
Well “zero gravity” doesn’t really mean zero gravity. It’s free fall (due to gravity). If you’re in orbit, you’re moving so fast “sideways” that you perpetually “miss” the Earth and just continue falling forever.
But also free fall (only being acted upon by the force of gravity) is exactly the same as experiencing no force at all, and that’s general relativity in a nutshell
the spacecraft doesn’t immediately lose all the celestial relative velocity just by going into space, it’s still moving extremely fast:
with the sun and earth through the galaxy
with the Earth around the sun
and is still affected by Earth’s gravity, just now it’s able to counter Earth’s pull with a faster motion pulling it outward, so it balances out to appear weightless
Just by going into orbit and counterbalancing the Earth’s gravity with rotational velocity doesn’t mean it’s not still moving extremely fast relative to the stars
Guy forgot about momentum
Also, if a civilization is advanced enough to create space-time bubbles, they are advanced enough to have speed matching cruise control.
Seriously, you think building a world-separating spacetime bubble that can instantly travel lightyears away is believable, but that programming it to stay on a smooth predictable course along an orbital path is NOT believable?
But would they be advanced enough to see why kids like the sweet taste of Cinnamon Toast Crunch?
What a random throwback reference, hahah
That works for linear motion but not for rotation—that requires acceleration (provided by gravity).
(I know, it’s a meme comment and I’m being pedantic…)
Wouldn’t it be inertia?
I forgot when the first manned spacecraft went into zero gravity and they got left behind as the Earth hurled away from them but OP reminded me about it.
Well “zero gravity” doesn’t really mean zero gravity. It’s free fall (due to gravity). If you’re in orbit, you’re moving so fast “sideways” that you perpetually “miss” the Earth and just continue falling forever.
But also free fall (only being acted upon by the force of gravity) is exactly the same as experiencing no force at all, and that’s general relativity in a nutshell
the spacecraft doesn’t immediately lose all the celestial relative velocity just by going into space, it’s still moving extremely fast:
Just by going into orbit and counterbalancing the Earth’s gravity with rotational velocity doesn’t mean it’s not still moving extremely fast relative to the stars
“Zero gravity” isn’t actually zero gravity. In orbit, you’re still falling, the planet is just curving away at the same rate as the fall