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|Cache||You know who knows machine learning? People who look at the stars all day. And when it comes to what constellations of clothes and shows and music you will like, some of the same principles apply.|
|Cache||Emin, I know it's hard for you to accept it. However, that is the case. Hovannes Adamian (1879–1932), one of the founders of color television
Sergei Adian (b. 1931), one of the most prominent Soviet mathematicians
Tateos Agekian (1913–2006), astrophysicist, a pioneer of stellar dynamics
Abraham Alikhanov (1904–1970), Soviet physicist, a founder of nuclear physics in USSR
Victor Ambartsumian (1908-1906), astrophysicist, one of the founders of theoretical astrophysics
Gurgen Askaryan (1928–1997), physicist, inventor of light self focusing
Boris Babayan (b. 1933), father of supercomputing in the former Soviet Union and Russia
Mikhail Chailakhyan (1902–1991), founder of hormonal theory of plant development
Artur Chilingarov (b. 1939), polar explorer, member of the State Duma from 1993 to 2011
Bagrat Ioannisiani (1911–1985), designer of the BTA-6, one of the largest telescopes in the world
Andronik Iosifyan (1905–1993), father of electromechanics in the USSR, one of the founders of Soviet missilery
Alexander Kemurdzhian (1921–2003), designer of the first rovers to explore another world: first moon rovers and first mars rovers
Semyon Kirlian (1898–1978), founder of Kirlian photography; discovered that living matter is emitting energy fields
Ivan Knunyants (1906–1990), chemist, a major developer of the Soviet chemical weapons program
Samvel Kocharyants (1909–1993), developer of nuclear warheads for ballistic missiles
Yuri Oganessian (b. 1933), nuclear physicist, the world's leading researcher in superheavy elements
Leon Orbeli (1882–1958), founder of evolutionary physiology
Mikhail Pogosyan (b. 1956), aerospace engineer, general director of Sukhoi
Norair Sisakian (1907–1966), biochemist, a founder of space biology; pioneer in biochemistry of sub-cell structures and technical biochemistry
Karen Ter-Martirosian (1922–2005), theoretical physicist, known for his contributions to quantum mechanics and quantum field theory
These are just some of them.|
Há 3,5 milhões de anos, um buraco negro supermassivo explodiu no meio da Via Láctea — explosão tão grande que o impacto foi sentido a 200 mil anos-luz de distância, na Corrente de Magalhães. A explosão foi desencadeada por um disparo de radiação ionizante no buraco negro Sagittarius A*, que tem a massa cerca de 4 milhões de vezes maior à do Sol. A descoberta foi realizada por cientistas estadunidenses e australianos e será publicada em breve no The Astrophysical Journal.
Chamado de "bengala de Seyfert", o fenômeno emitiu uma onda de radiação tão poderosa que saiu ao espaço profundo em forma de dois "cones de ionização" radioativos
Usando dados coletados pelo Telescópio Espacial Hubble, os pesquisadores calcularam que a explosão maciça ocorreu há pouco mais de 3 milhões de anos (um evento considerado surpreendentemente recente em termos galácticos). Para se ter uma ideia da escala de tempo, quando ocorreu a explosão do buraco negro, o asteroide que provocou a extinção dos dinossauros já tinha acontecido há 63 milhões de anos, e os ancestrais da humanidade, os australopitecinos, estavam povoando a África.
"Isso mostra que o centro da Via Láctea é um lugar muito mais dinâmico do que havíamos pensado anteriormente. É uma sorte que não estamos morando por lá", disse a professora Lisa Kewley, diretora do centro de astronomia ASTRO 3D. Os pesquisadores estimam que a explosão durou provavelmente 300 mil anos — um período que também é bastante curto em termos galácticos.
"Esses resultados mudam dramaticamente nossa compreensão da Via Láctea", afirmou a coautora Magda Guglielmo, da Universidade de Sydney. "Sempre pensamos em nossa galáxia como uma galáxia inativa, com um centro não tão brilhante. Esses novos resultados abrem a possibilidade de uma reinterpretação completa de sua evolução e natureza.
Dr. Richard Daystrom on (News Article):Super-sized Space Bubbles in Another Galaxy Are Spewing Cosmic Rays in Our Direction.....Cache
Super-sized Space Bubbles in Another Galaxy Are Spewing Cosmic Rays in Our Direction.....
10/07/2019 / By Edsel Cook
You have probably seen a child huffing and puffing and blowing at a bubble blower toy to fill the air with glistening soap bubbles. Researchers identified a galaxy in the universe that is going through a similar phase in its life — except its space bubbles are shooting cosmic rays in the general direction of Earth.
The NGC 3079 galaxy lies 67 million light-years from the sun. It produced two huge bubbles of gas that span several thousand light-years in diameter.
Both formations gave off tremendous amounts of highly charged particles that streaked across the vast void as cosmic rays. Their particles displayed 100 times more energy than any counterpart on Earth, including the ones created and studied at the Large Hadron Collider in Switzerland.
A NASA-led international team of researchers from the United States, Canada, France, and Germany made this discovery. They went over imagery sent by the Hubble Space Telescope and the Chandra X-ray Observatory — two of the four “Great Observatories” launched by NASA from 1990 to 2003.
They spotted the two cosmic bubbles bobbing near the center of NGC 3079. The researchers released their findings in The Astrophysical Journal. (Related: Sci-fi in real life: Scientists propose building a space station INSIDE an asteroid and using its gravity to mine valuable space rocks.)
A distant galaxy formed two big super bubbles
While researchers have spotted similar bubbles in the past, the vast bulk of the two cosmic formations in NGC 3079 earned them the classification of “super bubbles.”
The bulkier member of the pair sported a diameter of 4,900 light-years. Meanwhile, its partner measured around 73 percent of its size (3,600 light-years).
To give an idea of how big these super bubbles are, the orbit of Neptune around the sun measures a diameter of 5.6 billion miles (nine billion kilometers). Multiply that by one thousand, and you get a light-year, 5.6 trillion miles (nine trillion kilometers.)
Now, note that both NGC 3079 super bubbles have diameters that span thousands of light-years. The bigger super bubble measures more than 27.4 quadrillion miles (50.4 quadrillion kilometers).
These and other super bubbles throughout the universe are made up of stellar gas that originated in stars in their home galaxy. While a star releases gas regularly, it may experience a tremendously strong shock wave or multiple such events. The shock waves hurl its material so far into space that the expelled gas forms a bubble-shaped structure.
The secret origin of NGC 3079’s super bubbles
The NASA researchers might know about the process that formed cosmic bubbles, but they remained mystified regarding the particular event that produced the shock waves responsible for creating NGC 3079’s super bubbles.
One theory involves newly formed stars. A lot of energy goes into the birth of a star. The process produces “stellar winds” similar to solar wind, but arguably much stronger.
These stellar winds may possess the force to cast stellar gas into the far reaches of space. And there are a lot of stars being born.
Another theory attributes super bubbles to the activity of super-massive black holes. Often found in the hearts of galaxies, the titanic space-time distortions devour anything that passes their event horizon.
Whenever a black hole consumes matter, it releases immense amounts of energy. The radiation from the supermassive examples has enough energy to form super bubbles.
Like most galaxies, NGC 3079 hosts a super-massive black hole in its center. And this black hole so happens to sit in between the super bubbles, lending credence to this theory.
Whatever their origin, the super bubbles appear to act as natural particle accelerators of immense power. The interactions within the gas-filled cavity may impart tremendous amounts of energy on cosmic particles. They may be a source of the cosmic rays that make space travel so risky.
|Cache||A luminous companion to the phenomenal bestseller Astrophysics for People in a Hurry. Astrophysicist Neil deGrasse Tyson has attracted one of the world’s largest online followings with his fascinating, widely accessible insights into science and our universe. Now, Tyson invites us to go behind the scenes of his public fame by revealing his correspondence with [...]|
|Cache||Breakthroughs centred on 'ancient radiation' that originated during the Big Bang 14 billion years ago.|
The center of the Milky Way exploded just 3.5 million years ago. At least, that’s what researchers at Australia’s ARC Center of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) believe. […]
|Cache||Mit dem Nobelpreis für Physik werden in Stockholm die Astrophysiker James Peebles, Michel Mayor und Didier Queloz ausgezeichnet - für ihre Arbeiten zum Universum und der Entdeckung eines Planeten. |
I can't speak to the scientific value of the paper--actual quote:
But the writers of "What if Planet 9 is a Primordial Black Hole?" get an A for showmanship. Page 5 includes an "exact scale image" of the black hole discussed:
Distributed filtered hyperinterpolation for noisy data on the sphere. (arXiv:1910.02434v1 [math.CA])Cache
Problems in astrophysics, space weather research and geophysics usually need to analyze noisy big data on the sphere. This paper develops distributed filtered hyperinterpolation for noisy data on the sphere, which assigns the data fitting task to multiple servers to find a good approximation of the mapping of input and output data. For each server, the approximation is a filtered hyperinterpolation on the sphere by a small proportion of quadrature nodes. The distributed strategy allows parallel computing for data processing and model selection and thus reduces computational cost for each server while preserves the approximation capability compared to the filtered hyperinterpolation. We prove quantitative relation between the approximation capability of distributed filtered hyperinterpolation and the numbers of input data and servers. Numerical examples show the efficiency and accuracy of the proposed method.
|Cache||When: Friday, October 11, 2019 - 10:00 AM - 12:00 PM|
Where: Si Birch Community Room
The public is welcome to come to meet local veterans, and to enjoy free coffee and donuts. This month, astrophysicist Alma Ruiz-Velasco, PhD, of Lowell Observatory in Flagstaff, will speak about the past, present, and future of the Observatory and its programs.
The Gruber Foundation invites nominations on behalf of individuals whose achievements in Cosmology, Genetics, or Neuroscience would make them suitable candidates for recognition through the 2020 Gruber International Prize Program. Each prize, which is accompanied by a $500,000 unrestricted monetary award, is designed both to recognize groundbreaking work in each field and to inspire additional efforts that effect fundamental shifts in knowledge and culture. Recipients are selected by a committee of distinguished experts in each field.
Nomination forms for each field can be completed and submitted online. The deadline for nominations is 15 December 2019.
The Cosmology Prize honors a leading cosmologist, astronomer, astrophysicist, or scientific philosopher for theoretical, analytical, conceptual, or observational discoveries leading to fundamental advances in our understanding of the universe.
Since 2001, the Cosmology Prize has been cosponsored by the International Astronomical Union.
Further information on the Foundation and the individual Prizes is available available on the Gruber Foundation webpage.
|Cache||Astronomové z celého světa pilně studují kometu 2I/Borisov – druhý známý mezihvězdný objekt, který zavítal do Sluneční soustavy. A někteří již odhalili poměrně zajímavé věci.
Například tým z Institute of Astrophysics of the Canary Islands v žurnálu Research Notes of the AAS publikoval článek z ...|
|Cache||Der diesjährige Physiknobelpreis geht an drei Astrophysiker. Christoph Seidler erklärt im Video, um welche fundamentalen Erkenntnisse und Entdeckungen es dabei geht. |
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