Cosmic fog helps scientists revise Hubble constant again

At the cosmic level, dark energy greatly drives the expansion of the universe at a rate known as the Hubble constant. The estimate of this rate is derived from the work of astronomer Ewdin Hubble, and the Hubble Space Telescope is taken from its name. For decades to go, experts have been refining estimates of the constant. As for the latest developments, thanks to a team of scientists at The University of Clemson.


(Image via Slash Gear)

The original Hubble Constant was estimated at 500 km/(s. Mpc) or about 500 km . . . 310 miles), or 3.26 million light-years per second.

In the years since, academics have been trying to “recalibrate” the results, but Clemson researchers point out that they create different confusions. In the newly published study, it revised the unit estimate to 67.5 km (42 miles).

The study is believed to have been designed with data on gamma-ray attenuation from multiple telescopes, as well as models from the background light outside the Milky Way (described as a “cosmic fog”/Cosmic Fog).

“Technology allows us to measure this key property of the universe using a separate strategy, a new approach independent of existing methods,” explains Alberto Dominguez, a researcher.

The analysis it developed paves the way for better measurements with the Cherenkov telescope array in the future. Cherenkov, under development, is also the most ambitious ground-based high-energy telescope ever developed.

If you compare the expansion of the universe with that of a balloon, two points can be drawn on the balloon, and then they will be further and further apart as they increase in size.

It is not the air that expands the universe, but the dark energy and dark matter, which make up the vast majority of the mass of the universe.

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