Sorry Rhavin, I've been wondering if I could be bothered wading in, but I can't let this pass -
Mass can be describes as that which warps space (the warping of space being gravity)
Yes, this is good.
How can you say, essencially, that "space warps space?" That doesn't make sense.
Yes it does! I'm afraid to say, but 2BP is correct in saying that space has mass - though not for reasons that he understands. GR is a non-linear theory, and as such space-time curvature is coupled to (generated by) not only conventional ideas of matter and energy, but to itself: curvature generates curvature. This is how we can have non-trivial vacuum (empty of matter) solutions to GR. At the quantum level, we see this as gravitons interacting with gravitons. Gluons do the same - quantum chromodynamics is a non-linear theory. Electromagnetism is linear so photons do not self-interact, directly - which is fortunate as there would be no such thing as 'sight' if they did!
So, a volume of curved space will exhibit a measurable mass.
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