I understand that gravity is the curvature of space time. If that’s true, doesn’t it fully explain gravity? Why do we need gravity waves and/or gravitons?
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Imagine things like a really big trampoline. Big things bend the trampoline, so that other things tend to move towards them. This is a standard – if not great – explanation of gravity.
Now, if there’s a big enough thing moving fast enough, it not only bends the trampoline, it sends waves out. Technically, everything does it; but the waves are so small that you can’t detect them from most things – so only really big things moving really fast send out waves that are large enough you can detect them.
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