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We may have to rewrite our understanding of gravity


ESA/Hubble & NASA, R. Tully; ack
I’VE been giving a lot of talks about my research to a range of scientific audiences of late. The listeners range from groups that are mainly undergraduates to those made up of specialists in my field – in other words, people who are also searching for and trying to understand the behaviour of dark matter.
In nearly all of these presentations, I start by explaining Vera Rubin and Kent Ford’s observations of galaxies. These showed that there was a mismatch between their measurements of galactic masses and what one might expect the mass to be … ....

Vera Rubin , Kent Ford , Chanda Prescod Weinstein , Scientist Default Image , Galactic Mass , Dark Matter , வேரா ரூபின் , கேண்ட் ஃபோர்ட் , சாந்தா பிரேஸ்கோத் வெய்ன்ஸ்டீன் , விஞ்ஞானி இயல்புநிலை படம் , விண்மீன் நிறை , இருள் விஷயம் ,

Twinkling Black Holes Reveal an Invisible Cloud in Our Galaxy


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At first, Yuanming Wang was not excited. More relieved, maybe. The first -year astrophysics PhD student at the University of Sydney sat in front of her computer, looking at images in which she’d found the signs of radio waves from distant galaxies twinkling, just as she had hoped. But because Wang’s discovery relied more on scouring ones and zeros than peering through a telescope and the discovery itself was just plain
weird it took awhile for the moment to hit.
Radio wave “twinkling,” known as scintillation, happens when the radio signals from sources like stars and black holes get interrupted as they stream toward Earth. Detecting scintillation from distant galaxies is very rare. Only a tiny fraction of the night sky will yield these signals, and most telescopes are unable to capture variations on such fast timescales. But Wang found hallmarks of scintillation from six galaxies at once. And ....

New South Wales , Tara Murphy , University Of Sydney , Milky Way , Black Holes , Radio Telescopes , புதியது தெற்கு வேல்ஸ் , தாரா மர்பி , பல்கலைக்கழகம் ஆஃப் சிட்னி , பால் வழி , கருப்பு துளைகள் , வானொலி தொலைநோக்கிகள் ,

Can the laws of physics disprove God?


I still believed in God (I am now an atheist) when I heard the following question at a seminar, first posed by Einstein, and was stunned by its elegance and depth: ‘If there is a God who created the entire universe and ALL of its laws of physics, does God follow God’s own laws? Or can God supersede his own laws, such as travelling faster than the speed of light and thus being able to be in two different places at the same time?’ Could the answer help us prove whether or not God exists or is this where scientific empiricism and religious faith intersect, with NO true answer? David Frost, 67, Los Angeles. ....

Los Angeles , Terry Pratchett , Juergen Faelchle Shutterstock , David Frost , Jurik Peter Shutterstock , Star Trek , Hubble Space , Reaper Man , Life 39s Big Questions , Quantum Physics , லாஸ் ஏஞ்சல்ஸ் , டேவிட் பனி , நட்சத்திரம் மலையேற்றம் , ஹப்பிள் இடம் , ரீபர் மனிதன் , வாழ்க்கை பெரியது கேள்விகள் , குவாண்டம் இயற்பியல் ,

Ahura Mazda and Angra Mainyu In Zoroastrianism's Creation Mythology


Ahura Mazda And Angra Mainyu: Polar Opposites
There are several different accounts of how Ahura Mazda and Angra Mainyu are related to one another. One of these versions can be found in the
Gathas, the 17 Avestan hymns believed to have been composed by Zoroaster (known also as Zarathustra), the founder of Zoroastrianism. The
Gathas are thought to have been written during the 14th or 13th century BC, and were included in the
Avesta (the primary collection of Zoroastrian religious texts) when it was codified in about the 7th century AD.
According to the
Gathas, a spirit by the name of Vohu Manah appeared before Zoroaster and commanded him to oppose the bloody sacrifices of the traditional Iranian cults, and to give aid to the poor. Although Zoroaster was unaware at first, he later learned that the spirit was sent by Ahura Mazda. Following this revelation, Zoroaster began to preach that through Spenta Mainyu (meaning “Creative Spirit”), Ahura Mazda ....

Naqshe Rostam , Spenta Mainyu , Angra Mainya , Dakhmeh Zartoshtian Zoroastrian , Amesha Spenta , Ardashiri Darafsh Kaviyani , Angra Mainyu , Ahuna Vairya , Vohu Manah , Fars News Agency , Ahura Mazda , Middle Persian , Darafsh Kaviyani , Mazda And Angra Mainyu , Polar Opposites , Last Judgment , Best Purpose , Book Pahlavi , About The Origins Of Ahura Mazda , Dakhmeh Zartoshtian , Zoroastrian Towers , Mazda Ahura , Behistun Inscription , Investiture Relief , Creation Myth , அஹுரா மாஜ்த ,

The cosmologist modelling the Universe with maths


The cosmologist modelling the Universe with maths
By Charis Goodyear
Dr Tobias Baldauf likes nothing better than seeing an equation ‘cross reality’. His work is helping us to answer some of the remaining questions about the Universe.
My research is concerned with the history and composition of the Universe. But I study just one tiny piece of this complex puzzle. Through the use of mathematics and computational modelling, I describe how stuff – that is matter and galaxies – is distributed throughout the Universe.
This distribution is called the Large-Scale Structure (LSS). The maps we produce of the LSS look a bit like a sponge, with holes of nothingness within the matter. The map is really a pattern of threads that connect denser dots where you have accumulations of galaxies. ....

Graduate Tutor , Theoretical Physics , Covid 19 , Clare Hall , பட்டதாரி ஆசிரியர் , கோட்பாட்டு இயற்பியல் , புகைப்படம் எடுத்தல் , சர்வதேச பரவல் , தெளிவு மண்டபம் ,