Mysterious Dark Matter, invisible stuff that makes up most of mass of galaxies is confounding scientists again

Dark matter, mysterious invisible stuff that makes up most of the mass of galaxies including our own Milky Way, is confounding scientists again, with new observations of distant galaxies conflicting with the current understanding of its nature.

Research published this week revealed an unexpected discrepancy between observations of dark matter concentrations in three massive clusters of galaxies encompassing trillions of stars and theoretical computer simulations of how dark matter should be distributed.

“Either there is a missing ingredient in the simulations or we have made a fundamentally incorrect assumption about the nature of dark matter,” Yale University astrophysicist Priyamvada Natarajan, a co-author of the study published in the journal Science, said on Friday.

Dark matter is the invisible glue that holds stars together inside a galaxy. It also creates an invisible scaffold that enables galaxies to form clusters. But it has very peculiar properties. It does not emit, absorb, or reflect light, and does not interact with any known particles.

The bulk of the matter in the universe, about 96%, is thought to be dark matter, with ordinary matter – the visible stuff that makes up stars, planets, and people – a mere 4%.

Dark matter’s presence is known only through its gravitational pull on the visible matter in space. It differs from the similarly enigmatic and unseen dark energy, which is considered a property of space and is driving the universe’s accelerated expansion. Dark energy is repulsive. Dark matter attracts through gravity.

The new study involved observations from the Hubble Space Telescope and the European Southern Observatory’s Very Large Telescope in Chile.

When the light from distant sources like faraway galaxies travels through matter such as another galaxy or a cluster of them, the light is deflected and bends – a phenomenon called “gravitational lensing,” said astrophysicist and study lead author Massimo Meneghetti of the Observatory of Astrophysics and Space Science in Bologna and National Institute for Astrophysics in Italy.

The new observations showed that gravitational lensing effects produced by galaxies residing inside the huge galaxy clusters were far stronger than the current dark matter theory envisioned, suggesting an unexpectedly large concentration of dark matter in these galaxies.

Globally, women make up around 25 percent of the workforce in the aerospace industry. In an effort to carry out its

Science & technology sector remain neglected in Pakistan; both at government and public level. Even, when it comes to development or criticism, there was no media to address the issues. We all know that the news media plays a critical role as one of the primary means through which scientific and technological issues are brought to the attention of the general public. The reality of science for most people is what they experience through mass media channels. Good reporting allows people to evaluate science policy issues and make rational personal choices; poor reporting can mislead a public that is increasingly affected by science. The need for the science and technology newspaper took place and the concept of weekly (future’s daily) newspaper “Technology Times” evolve.

Our Contributors are the premier journalist volunteer at their campus. The article contribution program provides opportunity to the students to showcase their talent and their understanding in science communication to promote science culture in the academia, and to propagate science literacy as well.

Source: https://www.technologytimes.pk/2020/09/12/scientists-got-confounded-on-new-findings-of-mysterious-dark-matter/

Dark matter, Universe, Galaxy cluster, Galaxy

World news – GB – Scientists Got Confounded On New Findings Of Mysterious Dark Matter

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