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Scientists confounded by new findings on universe’s mysterious dark matter

USA Space pvt LLC,America by USA Space pvt LLC,America
September 12, 2020
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Scientists confounded by new findings on universe’s mysterious dark matter
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Washington – Darkish matter, mysterious invisible stuff that makes up a lot of the mass of galaxies together with our personal Milky Approach, is confounding scientists once more, with new observations of distant galaxies conflicting with the present understanding of its nature.

Analysis revealed this week revealed an sudden discrepancy between observations of darkish matter concentrations in three large clusters of galaxies encompassing trillions of stars and theoretical laptop simulations of how darkish matter ought to be distributed.

“Both there’s a lacking ingredient within the simulations or now we have made a elementary incorrect assumption concerning the nature of darkish matter,” Yale College astrophysicist Priyamvada Natarajan, a co-author of the research revealed within the journal Science, stated on Friday.

Darkish matter is the invisible glue that holds stars collectively inside a galaxy. It additionally creates an invisible scaffold that allows galaxies to kind clusters. However it has very peculiar properties. It doesn’t emit, soak up or replicate mild and doesn’t work together with any identified particles.

The majority of the matter within the universe, about 96 %, is regarded as darkish matter, with bizarre matter — the seen stuff that makes up stars, planets and other people — a mere 4 %.

Darkish matter’s presence is understood solely by means of its gravitational pull on seen matter in area. It differs from the equally enigmatic and unseen darkish vitality, which is taken into account a property of area and is driving the universe’s accelerated enlargement. Darkish vitality is repulsive. Darkish matter attracts by means of gravity.

The brand new research concerned observations from the Hubble House Telescope and the European Southern Observatory’s Very Giant Telescope in Chile.

When the sunshine from distant sources like faraway galaxies travels by means of matter akin to one other galaxy or a cluster of them, the sunshine is deflected and bends — a phenomenon referred to as “gravitational lensing,” stated astrophysicist and research lead creator Massimo Meneghetti of the Observatory of Astrophysics and House Science in Bologna and Nationwide Institute for Astrophysics in Italy.

The brand new observations confirmed that gravitational lensing results produced by galaxies residing inside the large galaxy clusters have been far stronger than present darkish matter concept envisioned, suggesting an unexpectedly giant focus of darkish matter in these galaxies.

“That is fairly stunning,” Meneghetti stated.

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  • The massive galaxy cluster MACSJ 1206 is seen in this undated image.   | NASA/ESA / G. CAMINHA (UNIVERSITY OF GRONINGEN), M. MENEGHETTI  (OBSERVATORY OF ASTROPHYSICS AND SPACE SCIENCE OF BOLOGNA), P. NATARAJAN (YALE UNIVERSITY) / THE CLASH TEAM AND M. KORNMESSER / ESA / HUBBLE / VIA REUTERS
    The huge galaxy cluster MACSJ 1206 is seen on this undated picture. | NASA/ESA / G. CAMINHA (UNIVERSITY OF GRONINGEN), M. MENEGHETTI (OBSERVATORY OF ASTROPHYSICS AND SPACE SCIENCE OF BOLOGNA), P. NATARAJAN (YALE UNIVERSITY) / THE CLASH TEAM AND M. KORNMESSER / ESA / HUBBLE / VIA REUTERS
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USA Space pvt LLC,America

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