It's a bit easier to comprehend just how vast and empty our solar system really is with a copy of Mishka Henner's Astronomical, which squeezes a scale model of our sun and planets into a 12-volume 6000-page tome.
Every single page represents one million kilometres, and not surprisingly your $US156 investment gets you thousands of pages featuring nothing but the emptiness of space.
A waste of paper? Maybe. But it would be pretty cool knowing I had an entire solar system sitting on my shelf. And while it would take a while to get through, this would make for a pretty easy grade school book report. [Mishka Henner via NewScientist]