NewsWorldHubble identifies an unusual wrinkle in the rate of...

Hubble identifies an unusual wrinkle in the rate of expansion of the universe

-

Hubble’s most important findings on its 32nd birthday 0:50 (CNN) — Measuring the expansion rate of the universe was one of the main goals of the Hubble Space Telescope when it launched in 1990. In the past 30 years, the space observatory it has helped scientists discover and refine that rate of acceleration, as well as uncover a mysterious wrinkle that only new physics could resolve. Hubble has observed more than 40 galaxies that include pulsating stars as well as exploding stars called supernovae to measure even greater cosmic distances. Both of these phenomena help astronomers mark astronomical distances like mile markers, which have hinted at the rate of expansion. In the quest to understand how fast our universe is expanding, astronomers already made an unexpected discovery in 1998: “dark energy”. This phenomenon acts as a mysterious repulsive force that speeds up the rate of expansion. And there’s another twist: an unexplained difference between the rate of expansion of the local universe and that of the distant universe just after the Big Bang. Scientists don’t understand the discrepancy, but acknowledge that it is strange and might require new physics. “The most accurate measure of the expansion rate of the universe is being obtained from the gold standard of telescopes and cosmic mile markers,” said Nobel Laureate Adam Riess of the Space Telescope Science Institute and Distinguished Professor of Johns Hopkins University in Baltimore, in a statement. “This is what the Hubble Space Telescope was built for, using the best techniques we know to do it. This is probably Hubble’s magnum opus, because it would take another 30 years of Hubble’s life to even double this sample size.” Decades of Observing The telescope is named after pioneering astronomer Edwin Hubble, who discovered in the 1920s that the distant clouds of the universe were actually galaxies. (He died in 1953). Hubble built on the work of astronomer Henrietta Swan Leavitt, who in 1912 discovered the periods of brightness of pulsating stars called Cepheid variables. Cepheids act as cosmic landmarks, periodically brightening and dimming in our galaxy and others. Hubble’s work led to the revelation that our galaxy was one of many, forever changing our perspective and place in the universe. The astronomer continued his work and discovered that distant galaxies seemed to be moving rapidly, suggesting that we live in an expanding universe that started with a big bang. The detection of the expansion rate of the universe contributed to the award of the 2011 Nobel Prize in Physics, awarded to Saul Perlmutter, Brian P. Schmidt, and Riess “for the discovery of the accelerated expansion of the universe through observations of distant supernovae.” Riess continues to lead SHOES, short for Supernova, H0, for the Dark Energy Equation of State, a scientific collaboration investigating the rate of expansion of the universe. His team is publishing a paper in The Astrophysical Journal that provides the latest update on the Hubble constant, as the rate of expansion is known. An unresolved discrepancy Measuring distant objects has created a “cosmic distance ladder” that can help scientists better estimate the age of the universe and understand its foundations. Various teams of astronomers using the Hubble telescope have come up with a value for the Hubble constant that is equal to 73, plus or minus 1 kilometer per second per megaparsec. (A megaparsec is a million parsecs, or 3.26 million light-years.) “The Hubble constant is a very special number. It can be used to thread a needle from the past to the present for an end-to-end test of our understanding of the universe. This has required an admirable amount of detailed work” , states Licia Verde, cosmologist at the Catalan Institution for Research and Advanced Studies and the Institute of Cosmos Sciences of the University of Barcelona, ​​in a statement. But the actual predicted expansion rate of the universe is slower than that observed by the Hubble telescope, according to astronomers using the standard cosmological model of the universe (a theory that suggests the components of the Big Bang) and measurements made by the Planck mission. of the European Space Agency between 2009 and 2013. Planck, another space observatory, was used to measure the cosmic microwave background or radiation left over from the Big Bang 13.8 billion years ago. Scientists on the Planck mission arrived at a Hubble constant of 67.5 or so, or 0.5 kilometers per second per megaparsec. The James Webb Space Telescope, launched in December, will be able to observe the Hubble landmarks with higher resolution and at greater distances, which could help understand the discrepancy between the two figures. This presents an exciting challenge to cosmologists who once endeavored to measure the Hubble constant and are now wondering what additional physics might help them unravel a new mystery about the universe. “I don’t really care what the value of the expansion is specifically, but I like to use it to learn about the universe,” Riess said.

1 COMMENT

  1. Download Benny Mayengani – Tiko Raka Hina (Page 11) Album Mp3 Zip 2021-09-23
    Download MUSICA CRISTIANA INSTRUMENTAL – MAJESTUOSO Album Mp3 Zip 2021-09-23
    Download Piano Sunday – Human Emotions: In Love Album Mp3 Zip 2021-09-23
    Download Los niños cantores de Morelia – Los Niños Cantores De Morelia Album Mp3 Zip 2021-09-23
    Download DRIFTIN’LINE – Born As Slaves We Die Free Album Mp3 Zip 2021-09-23
    Download MOTIP – WANT LOVE! – EP Album Mp3 Zip 2021-09-23
    Download Chillin Homie & Seong Guk – LOGIN Album Mp3 Zip 2021-09-23
    Download Ana Guerra – La Luz Del Martes Album Mp3 Zip 2021-09-23
    Download Chill Jazz – Jazz in the Background Album Mp3 Zip 2021-09-23
    Download ChillSpot Records – Matenga Na Gudo Riddim Album Mp3 Zip 2021-09-23
    Download Ventifacts – Ventifacts Album Mp3 Zip 2021-09-23
    Download Луиза Эльжуркаева – Даймахке безам Album Mp3 Zip 2021-09-23
    Download Bride – Bride Christmas Album Mp3 Zip 2021-09-23
    Download guillembautista – Nu Album Mp3 Zip 2021-09-23
    Download Dennis Bovell & Dubblestandart – @ Repulse “Reggae Classics” Album Mp3 Zip 2021-09-23
    Download Jaakko – No Light Without Darkness Album Mp3 Zip 2021-09-23
    Download Armin van Buuren – Asot 1035 – A State of Trance Episode 1035 (DJ Mix) Album Mp3 Zip 2021-09-23
    Download Dharmacide – Cult Band Member Album Mp3 Zip 2021-09-23
    Download Nkonsonkonson Star Band – How to Swim Album Mp3 Zip 2021-09-23
    Download Henri Bergmann – Protection (Remixes) [feat. Wennink] Album Mp3 Zip 2021-09-23
    Download Brenda Asnicar – Bandida Records Album Mp3 Zip 2021-09-23
    Download SAIYON – Recovery – EP Album Mp3 Zip 2021-09-23
    Download Caffè Jazz Italiano – Vino e Jazz Album Mp3 Zip 2021-09-23
    Download Soft Jazz Coffee Shop – Coffee Shop Soft Jazz Album Mp3 Zip 2021-09-23
    Download BOUZA – MADRID – AMSTERDAM – EP Album Mp3 Zip 2021-09-23

Comments are closed.

Latest news

North Korea, Pyongyang launches two missiles into the Yellow Sea

South Korean authorities denounced North Korea's launch this morning of two cruise missiles in the Yellow Sea, between the...

Clash Mbappé-Neymar: Mrs. Mbappé intervenes! – Sports.fr

Fayza Lamari reacted to the controversy sparked by the penalty case between Neymar and Kylian Mbappé on Saturday against...

How to clean the TV screen so that spots and smudges do not remain on it? Just 10 minutes! | Mójdom.sk...

Although the TV is not the first thing we think of when cleaning, dust on the screen or unsightly...

Reconstructed the evolutionary history of microbial diversity in the last 2,000 million years – SINC

The latest technologies have allowed scientists to sequence the DNA of...

You might also likeRELATED
Recommended to you