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I know that mass can bend fabric of space-time, which causes gravity by making an object curve around a planet or star but is there anything else that can bend it?

Other energy sources, forces anything?

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In addition to mass (energy), tension and pressure can also act as sources for gravity. All the sources are encapsulated in an object called the energy momentum tensor as described here

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  • $\begingroup$ more simple terms? so does this mean mass and also energy can bend space-time? $\endgroup$ – Nick1o2 Nov 2 '12 at 9:54
  • $\begingroup$ Yes energy, such as radiation, also acts as a gravitational source. $\endgroup$ – twistor59 Nov 2 '12 at 11:50

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