When the path of a light ray is bent, the image of the light source becomes distorted. This is what happens when light is bent as it passes from the air into the lenses of eyeglasses, producing a magnified image. Likewise, when sunlight is deflected as it travels through different layers of the atmosphere, the Sun
appears flattened. Another way that light paths can be bent is through the warping of space by a massive object such as a galaxy or galaxy cluster. The massive object acts as a gravitational lens that distorts the images of more distant background galaxies.
Here, there, and everywhere that a light wave is deflected by the medium it is traveling through.
"Here, There, & Everywhere" (HTE) is supported by the National Aeronautics and Space Administration under grant NNX11AH28G issued through the Science Mission Directorate.