What does it mean that a source of energy will curve spacetime ?

How is the energy measured?

Is it relative  to a particular frame of reference?

Does that mean that 2 different frames of reference will measure  the spacetime  curvature  of an identical region differently?

Does "region"  have to be understood in spacetime terms?

 

 

Inertial mass-energy is common to all frames, as is space-time curvature.
I assume you mean whether the kinetic energy gained through motion ( equivalent to relativistic mass ) is responsible for any 'additional' curvature ?

Speed, and energy are both frame dependent, so you can always have a frame where there is no speed ( at rest ), and therefore no additional energy.
So, no, there is no 'additional' space-time curvature.

Edited July 13, 20196 yr by MigL

6 hours ago, MigL said:

Inertial mass-energy is common to all frames, as is space-time curvature.
I assume you mean whether the kinetic energy gained through motion ( equivalent to relativistic mass ) is responsible for any 'additional' curvature ?

 

Yes that is what I was thinking of.

A nice simple answer that puts my question to bed.