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Originally Posted by [1ponders]
Hi Eardrum.
A couple of things here that might help. Jonny S' description can be taken a step further. Do google search for "Einstein Rings". These are arcs of light that appear around galaxies (and sometimes stars). They are the effects of mass warping space time and turning the space around the galaxy into a sort of lense. What we are seeing in the arcs is a galaxy that is directly behind the foreground galaxy. Now we shouldn't be able to see the rear galaxy but we do in the form of these arcs. The intervening galaxy has acted like a lens and this lens is formed of space/time being warped into a shape like a lens by gravity which is a caracteristic of mass.
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they used this bending of space on the cassini probe didnt they as it was slingshot around the sun....