|astronomy a law stating that the velocity of recession of a galaxy is proportional to its distance from the observer|
|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|Hubble's law (hŭb'əlz) Pronunciation Key
A law of cosmology stating that the rate at which astronomical objects in the universe move apart from each other is proportional to their distance from each other. current estimates of the value of this proportion, known as Hubble's constant, put its value at approximately 71 kilometers per second per megaparsec.