Mass curves space. And speed near the the speed of light increases mass. So for someone traveling near c and is passing a partice at rest, the traveling observe feels like he's at rest and the other particle is moving. So if the other particle is moving wrt his rest frame, does he see an increased curvature of space surrounding the particle approaching him? Whereas, a particle traveling along side the approaching particle will experience a different curvature? Does the curvature of mass depend on the speed of observers since the mass of that object does depend on the speed of the observer? Thank you.