@[email protected] to Lemmy [email protected]English • 1 year ago1.1 Historylemmy.worldimagemessage-square139fedilinkarrow-up11.46Kcross-posted to: [email protected]
arrow-up11.46Kimage1.1 Historylemmy.world@[email protected] to Lemmy [email protected]English • 1 year agomessage-square139fedilinkcross-posted to: [email protected]
minus-square@[email protected]linkfedilink24•1 year agoAnd gravitational stuff. We kinda know it does it, but not how to do anything about it.
minus-squareIron Lynxlinkfedilink7•1 year agoAnd maybe also “big stuff”. I suppose those two overlap quite a lot?
minus-square@[email protected]linkfedilink5•1 year agoHow about something simple: Why does gravity feel the same as acceleration?
minus-square@[email protected]linkfedilink11•1 year agoYou can’t feel gravity. What we feel really is acceleration, the acceleration of the earth pushing us up against gravity.
minus-squareNatanaellinkfedilink1•1 year agoBecause of relativistic frames of reference. Standing on a surface in a gravity well means you’re being constantly pushed out of an inertial frame, by not allowing you to follow a geodesic path in spacetime, and the same effect happens under acceleration. https://youtu.be/XRr1kaXKBsU
And gravitational stuff. We kinda know it does it, but not how to do anything about it.
Surely that’s “heavy stuff”?
And maybe also “big stuff”. I suppose those two overlap quite a lot?
A nebula is one exception
I thought that meant black holes
How about something simple: Why does gravity feel the same as acceleration?
You can’t feel gravity. What we feel really is acceleration, the acceleration of the earth pushing us up against gravity.
Because of relativistic frames of reference.
Standing on a surface in a gravity well means you’re being constantly pushed out of an inertial frame, by not allowing you to follow a geodesic path in spacetime, and the same effect happens under acceleration.
https://youtu.be/XRr1kaXKBsU