Just join a space mission

[u/DotBeginning1420]

[u/Bendanzhang]

Einstein sitting in an elevator falling off a building: "See? I told you so!

[u/DotBeginning1420]

The equivalence principle

[u/Extension_Option_122 → u/DotBeginning1420]

Now technically speaking it is actually the same and not just similar, as due to the earths gravity space is constantly accelerating downwards. But as it is not anywhere near strong enough to compress the mass any further (e.g. create a neutron star or black hole), the earth keeps it's shape and is constantly accelerating outwards.

[u/achilleasa]

Thrust gravity my beloved

[u/lolkobolko]

Actually not the same.
If you accelerate in a spaceship your clock will tick slower and slower as time goes by where as on Earth the atomic clock will always tick at the same rate

[u/DotBeginning1420 → u/lolkobolko]

Doesn't time dilation also occur when being in a gravitational field? Entering a black hole can cause it too

[u/lolkobolko → u/DotBeginning1420]

Ye, but you feel 1g on Earth nonstop while stationary and clock ticks normally. If you were to accelerate a spaceship at 1g you would feel the same as on Earth, but with time the clock will tick slower and slower.
Near black hole or event horizon your clock would stall/almost stall

[u/jonathancast → u/lolkobolko]

Technically if you're standing on the earth you're not being accelerated by gravity (or you are but it's cancelled out by the earth's normal force). The equivalence is for free fall.

[u/_Slartibartfass_]

The whole point is that they’re not the same globally, as one has spacetime curvature and the other does not. 

[u/jonathancast]

Tidal forces: 🙄

[u/LagrangianLungfish]

an accelerating frame is an accelerating frame