i say no.....because it may be due to Laws of Refraction in different Mediums !!!!!
When a ray of light goes from rarer to denser medium, the ray (refracted ray) bends towards the normal in the denser medium.
If ray of light travels from denser to rarer medium the refracted ray bends away from the normal.
this what i trust ...
i may say we are following general relativity blindly without thinking this concept (Laws of Refraction in different Mediums).
its not gravity but due to the Laws of Refraction in different Mediums... it not gravity but Laws of Refraction in different Mediums acts as a kind of magnifying lens, brightening and bending the distant starlight....