Hubble constant

British  

noun

1. Also called: Hubble parameter.  the rate at which the expansion velocity of the universe depends on distance away. It is currently estimated to lie in the range 60–80 km s ^–1 megaparsec ^–1

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Example Sentences

Shajib specializes in observational cosmology and galaxy evolution, applying strong gravitational lensing to measure the Hubble constant and narrow down dark energy parameters.

From Science Daily

As a result of this observation, Hubble concluded that the universe must be expanding, and his calculated rate of expansion became known as the Hubble constant.

From Salon

Unfortunately, since Requiem was not discovered until 2019, long after it had faded from view, it was not possible to gather sufficient data to measure the Hubble constant then.

From Science Daily

That observation spawned the idea of the big bang—and decades of bickering over the rate at which the universe is expanding, the Hubble constant.

From Science Magazine

The number that describes the expansion goes by the name "the Hubble constant," appearing in multitude of different equations and models of the Universe and its constituents.

From Science Daily