Hi Geoffrey,
It is
possible that we are part of a binary star system with a brown dwarf. In 1995 we had not confirmed a single example. Today we have only around 600 known. They are very difficult to detect, especially below 750K. Brown dwarfs are constantly cooling - I wonder how many dip below detectable temperatures every year (and that don't omit other markers such as X-rays). They are known to contain water and are capable of producing planets - as a point of interest.
While i can't say where it is (the CIA keep deleting this
), or even if it exists - i don't believe science can rule it out just yet.