Quote:
Originally Posted by xelasnave
Also for who ever can field this one....IF Earth does not curve space how does GR give us our gravity???
alex
alex
|
Good question Alex.
In the absence of mass (and gravity), space is perfectly flat.
The strength of the gravitational field as a function of mass density determines the degree of space time curving.
The Earth's field strength is not strong enough for any significant space time curving.
It's no coincidence that for weak gravitational fields GR equations reduce to Newtonian equations. Hence Newtonian physics becomes a very good approximation for GR for weak fields.
Steven