        “The red planet is one they’ve visited, too.  There are a bunch of pictures taken from its surface.  They’ve been close to some of the other ones, too.”  She kept turning pages.  “I don’t see any other surface photographs, but they’ve been close to them, unless they have really powerful telescopes.”  She looked at Lyra, eyes sparkling.  “The only planet I’ve ever seen—besides our own, of course—appears as little more than a black dot, and can only clearly be seen when its sun is behind it.  With the most powerful telescope I have, it’s smaller than a flea.  Of course, there are much more powerful telescopes in Canterlot, but they won’t let just anypony use them.  I’ve seen a few drawings of other planets.  Even then, they are hardly larger than—than one of your marbles.  Unless they’re very tiny, they are far, far away.”