the universe teaches us
that you do not need to see
in order to believe
the earliest form of detection
of the dark and unseen other
is the effect on the one nearby
the behaviour of the object
is changed by the influence
of the far off invisible one
its gravity exerts itself
and pulls at its orbit
drawing it away from centre
into the black where it hides
it dances away for a time
swings back to norm
and spins off again
caught between pulls
endlessly