The robotic spacecraft MESSENGER found out as it looked toward the Earth during its closest approach to the Sun about three months ago.
You will have drawn a rectangular hyberbola whose point of closest approach to the origin is r.
That cocktail-hour moment is the precise time at which asteroid 2005 YU55, a 1,312-ft. (400 m) space rock discovered six years ago, will make its closest approach to Earth.
It is the closest approach to symbolic language of any creature apart from humans.
This was their closest approach to intimacy during their long Summer idyll.
