This amazing simulator by NASA can render an image that will show you what its like to look at any of the celestial objects in the Solar System from any other celestial object. For example, if I wanted to see what the Sun would look like from the surface of Mars, it would look like this:
There is a crazy amount of possibilities. You can even view celestial objects from any of the outer space missions like Voyager 1 or Cassini.
If you want to try it for yourself, click here.
Image taken from NASA Solar System Simulator.