Ev...that doesn't really sound like a complete answer, because the question still remains, isn't classical gravity a property of matter, with mass? Momentum isn't mass, so why should gravity affect photons?
From my Space.com readings, it sounds like physicists are pretty unanimous that gravity can be adequately described as a curvature of space-time. To me, then, it's pretty intuitive to simply say that light isn't necessarily "attracted" to a mass, but that it simply follows the most direct path through curved space, which happens to be curved by mass.
4-dimensional geometry is confusing.
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