Believe it or not, we've seen a few optical illusions in space over the year. Well, we haven't seen them – the Hubble ...

Earth crosses through Saturn’s “ring plane,” making the gas giant’s most iconic feature become nearly invisible ...

But, once it hangs high above the sky, where you're only likely to see the occasional ... Astronauts in space can also experience the moon illusion, even when there isn't anything in their line of ...

Here's the thing: That giant moon you see, as you look at the horizon, is the same size as when you see it in the sky. It's ...