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

Scientists have developed several methods to estimate the Hubble constant, but until now they have all relied on so-called distance ladders.

From Science Daily

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

But in recent years, this understanding of how the universe expands has been put into question as two independent measurements to calculate this rate, which is called the Hubble constant, mysteriously diverged.

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