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I know that matter (mass) curves spacetime, but do other forms of energy do the same? I.e. is matter the only form of energy that curves spacetime?

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marked as duplicate by John Rennie, Qmechanic Apr 11 '14 at 10:23

This question was marked as an exact duplicate of an existing question.

Yes, every type of energy. – jinawee Apr 10 '14 at 21:15
see this picture from wikipedia - anything that's in there has an effect on space-time geometry – Christoph Apr 10 '14 at 21:17
Possible duplicates: and links therein. – Qmechanic Apr 10 '14 at 21:18
possible duplicate of What are the factors affecting the spacetime curvature? – John Rennie Apr 11 '14 at 9:22