the answer is either a marthon or cross country.
Circumference.
Circumference
It is the name given to the straight line from the centre of a circle to its circumference when that distance is 18 mm.
The name given to a set of coordinates is "coordinate system".
The distance which is 10^-3 larger is 1.003 metres, and there is no specific name for it. The name of the distance which is 10^-3 times as large (not the same thing!) is a millimetre.
Pangaea
Constellation
Circumference.
Circumference.
Tsumanis or Tidal waves
Circumference
Its name shall be called "circle".
A cluster or star cluster
Speed
A circle.
Globular ClusterA huge group of stars that are close together is a star cluster. With many more stars it is a galaxy.
Hudson Bay Company