# Can Space-Time be Distorted by Anything Other Than Mass? [duplicate]

We know that mass distorts space-time. We also know that Einstein equated mass to energy. We believe that mass is energy and energy is mass.

Can space-time be distorted by anything other than mass? If energy can be transferred from point A to point B in space-time without the "delivery vehicle" of a moving body (mass), must space-time distort in order for that to be possible?

• $\uparrow$ Well, energy curves spacetime, cf. physics.stackexchange.com/q/107808/2451 and links therein. – Qmechanic Jan 15 '17 at 15:29
• Possible duplicate: physics.stackexchange.com/q/43251/50583 – ACuriousMind Jan 15 '17 at 15:31
• Possible duplicate of What bends fabric of space-time? – Kyle Kanos Jan 15 '17 at 18:11
• The Einstein Field Equations, $G_{\mu\nu}=8 \pi T_{\mu \nu}$, has $T$ the stress-energy tensor, which describes the flow of energy and momentum through a volume of spacetime. So pressure "distorts spacetime" too, and so does anything else which changes the stress-energy tensor. – user12029 Jan 15 '17 at 18:23
• Radiation does move energy from one spatial region to another. Could be electromagnetic or gravitational waves. No body of mass needed, both of those have energy and no rest mass, or body. As they move they distort the spacetime. – Bob Bee Jan 16 '17 at 5:56