This week, as a box of electronics called New Horizons prepares to complete a nearly 10-year journey to Pluto, it's a good moment to reflect on just how far away even the objects in our astronomical backyard are from us. Using our own wanderings on Earth as the judge of all things, evolution has left us poorly prepared for the epic scales of all things astronomical. We don't make very good judges of distance, not on cosmic scales at least.
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