One way is simple, the obvious fake look of the pictures. Another way is the source, a dubious institution that is famous for fake pictures. You can compare the problems and discrepancies between their fake pictures. Another way is looking at the impossibility by their own paradigm of getting a robot out there. Yet another way is look at the obvious contradictions in their own model (ie: the asteroid belt). Look at the contradictions of their model compared to reality (ie: fuel). Look at the contradictions of their claims compared to the Bible (ie: basic cosmology).
Even look at the contradictions of their own claims. Consider how they claim to have released pictures of what they call "pluto" in July, and in the article in the OP claim it took all this time to get these particular fake pictures which they claim were taken at the same time. So either the fake pictures from before were fake or the fake pictures this time were fake, or most logically both are fake.
Now I have some questions for you, and any other Christian here. The atheists can ignore it, they don't understand anything anyways. Why would you blindly trust without question an institution that tells absurd lies, that names its projects and names stars after abominations and demons, and that has a very open stance of being against the Bible?