HUBBLE CONSTANT

Pronunciation (US):

(GB):

IPA (US):

 Dictionary entry overview: What does Hubble constant mean? 

• HUBBLE CONSTANT (noun)
  The noun HUBBLE CONSTANT has 1 sense:

1. (cosmology) the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer; the Hubble constant is not actually a constant, but is regarded as measuring the expansion rate today

  Familiarity information: HUBBLE CONSTANT used as a noun is very rare.

 Dictionary entry details 

• HUBBLE CONSTANT (noun)

Sense 1

Meaning:

(cosmology) the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer; the Hubble constant is not actually a constant, but is regarded as measuring the expansion rate today

Classified under:

Nouns denoting quantities and units of measure

Synonyms:

Hubble's constant; Hubble's parameter; Hubble constant; Hubble parameter

Hypernyms ("Hubble constant" is a kind of...):

constant (a number representing a quantity assumed to have a fixed value in a specified mathematical context)

Domain category:

cosmogeny; cosmogony; cosmology (the branch of astrophysics that studies the origin and evolution and structure of the universe)

 Context examples 

Those measurements are used to calculate how fast the universe expands with time, a value known as the Hubble constant.

(Measuring Growth of Universe Reveals a Mystery, The Titi Tudorancea Bulletin)

Separate measurements from the European Space Agency’s Planck satellite, which maps the cosmic microwave background, predicted that the Hubble constant value should now be 67 kilometers per second per megaparsec.

(Measuring Growth of Universe Reveals a Mystery, The Titi Tudorancea Bulletin)