A light year is about 9.5 trillion kilometers, so both the first answer are completely wrong. On the other hand, each time we look at the sky we see the stars as they were when the light that reach us begin its journey; therefore, the distant the star the older the image we get of it.
The answer is that photographs of the stars taken at the same time show a more recent image of Alpha Centauri than Luyten's Star.
