the unknown parts of our solar system

摘要

ASTRONOMERS HAVE SPENT centuries filling in their sketches of our corner of the Milky Way. But these charts, like all maps, are only approximations of reality. Their blind spots likely harbor some unknown entities-bodies too small, too close to the sun, or too far away for us to see. Here are some celestial objects that stargaz-ers have suspected of dodging their telescopes over the years.