Wednesday , April 1 2020
Home / africa / Cosmic fog helps astrophysicists clock just how fast the universe is expanding

Cosmic fog helps astrophysicists clock just how fast the universe is expanding



At the cosmic level, dark energy is largely fueling the expansion of the universe, the rate of which is referred to as Hubble Constant. The astronomer after whom the Hubble Space Telescope was named. The University of Clemson led by the University of Clemson.

The original Hubble Constant estimated that the universe is expanding by 500 kilometers (310 miles) per second per megaparsec – that is, 3.26 million light-years or thereabouts. Work to ‘recalibrate’ this estimate has taken place in the years since, though the Clemson researchers have not produced it ‘mixed results.’

A newly published study details of a narrower estimate of 67.5 kilometers (42 miles) per megaparsec. The research involved data from multiple telescopes on gamma-ray attenuation and models on extragalactic background light, which is described as a sort of ‘cosmic fog.’

The study’s lead author Alberto Dominguez explained:

Our technique allows us to use an independent strategy – a new methodology. ground-based high-energy telescopes ever.

The universe’s expansion is compared to that of a balloon that expands. In the case of the universe, the expansion is driven by dark energy and dark matter, which makes up the majority of the universe.


Source link