When we see the Earth’s only Moon up in the sky, we often think about how small it is.  It’s only about 1/4 the diameter of the Earth, and at a distance of 384,000 Km, it looks small in the sky.  But often size is entirely a matter of perspective.  What we compare something to, that’s what determines it’s size.  When the Moon is high in the sky we easily compare it to the size of the window we are looking through, or to a nearby tree, or our outstretched hand.  All of this can make the Moon seem pretty tiny....