Friday, October 28, 2022
German president Frank-Walter Steinmeier calls for unity in face of cris...
Steinmeier opened with vivid descriptions of the horrors of war, noting that it had caused "the deepest crisis" that a reunified Germany has seen. He warned that "tougher, rough years are ahead of us."
The speech came at a time of uncertainly for Germany, and Steinmeier touched on many of the issues weighing on the minds of many people in the country. These included a cost of living crisis amidst soaring inflation and an energy crunch, as well as the war in Ukraine.
Ukrainian forces are inching closer to Russian-controlled territory. See...
Russian state media report the situation in the Kherson region of Ukraine is stabilizing, with less frequent artillery fire and no counterattacks from Ukrainian forces. Meanwhile, Ukrainian President Volodymyr Zelensky says the Russians will be besieged if they stay in the Kherson region. CNN's Frederik Pleitgen visits the front line to get a first-hand look.
Guerre en Ukraine : des opérations de déminage à l'aide d'un véhicule sp...
Des spécialistes ukrainiens du déminage utilise l'Armtrac 400, un véhicule de déminage qui a été acheté grâce à une collecte de fonds. Arseniy Dyadchenko, spécialiste principal du service d'urgence de l'État ukrainien, explique que la machine est optimale pour le déminage des zones à forte végétation et qu'elle peut résister à la détonation d'une mine antichar. Mais surtout, elle permettra de "préserver la vie et la santé" des démineurs ukrainiens.
Thursday, October 27, 2022
Astrônomos detectam bolha de gás quente em torno do buraco negro supermassivo da Via Láctea
eso2212pt-br — Nota de imprensa científica
Astrônomos detectam bolha de gás quente em torno do buraco negro supermassivo da Via Láctea
22 de Setembro de 2022
Com o auxílio do Atacama Large Millimeter/submillimeter Array (ALMA), os astrônomos descobriram sinais de um ”ponto quente” em órbita de Sagitário A*, o buraco negro no centro da nossa Galáxia. A descoberta nos ajuda a entender melhor o ambiente enigmático e dinâmico do nosso buraco negro supermassivo.
“Achamos que estamos olhando para uma bolha quente de gás girando em torno de Sagitário A* em uma órbita semelhante em tamanho à do planeta Mercúrio, mas fazendo um ciclo completo em apenas cerca de 70 minutos. Isso requer uma velocidade de cerca de 30% da velocidade da luz!”, explica Maciek Wielgus do Instituto Max Planck de Radioastronomia em Bonn, na Alemanha, que liderou este estudo publicado hoje na revista Astronomy & Astrophysics.
As observações foram obtidas com o ALMA nos Andes chilenos — um radiotelescópio que pertence parcialmente ao Observatório Europeu do Sul (ESO) — durante uma campanha da Colaboração EHT (Event Horizon Telescope) destinada a obter imagens de buracos negros. Em Abril de 2017, o EHT conectou oito radiotelescópios existentes em todo o mundo, incluindo o ALMA, para obter dados que resultaram na primeira imagem de Sagitário A*, recentemente divulgada. Para calibrar os dados EHT, Wielgus e colegas, que são membros da Colaboração EHT, usaram dados ALMA registrados simultaneamente com as observações EHT de Sagitário A*. Para surpresa da equipe, havia mais pistas escondidas nas medições obtidas apenas com o ALMA sobre a natureza do buraco negro.
Por acaso, algumas das observações tinham sido realizadas pouco depois de uma explosão de energia de raios-X emitida a partir do centro da nossa Galáxia, que foi detectada pelo Telescópio Espacial Chandra da NASA. Acredita-se que esses tipos de explosões, observadas anteriormente por telescópios infravermelhos e de raios-X, estejam associadas aos chamados “pontos quentes”, bolhas de gás quente que se deslocam a altas velocidades em órbitas muito próximas do buraco negro.
“O que é mesmo novo e interessante é o fato destas explosões estarem, até agora, apenas claramente presentes em observações infravermelhas e de raios-X de Sagitário A*. Estamos, pela primeira vez, vendo fortes indicações de que pontos quentes orbitando o buraco negro também estão presentes em observações de rádio”, disse Wielgus, também afiliado ao Centro Astronômico Nicolau Copérnico, Polônia, e à Iniciativa Buraco Negro da Universidade de Harvard, EUA.
“Talvez estes pontos quentes detectados nos comprimentos de onda do infravermelho sejam uma manifestação do mesmo fenômeno físico: à medida que esfriam, os pontos quentes que emitem no infravermelho tornam-se visíveis em comprimentos de onda mais longos, como os observados pelo ALMA e pelo EHT”, acrescenta Jesse Vos, estudante de doutorado na Universidade Radboud, na Holanda, também envolvido neste estudo.
Pensou-se durante muito tempo que estas explosões teriam origem nas interações magnéticas do gás muito quente que orbita muito próximo de Sagitário A* e, de fato, estes novos resultados apoiam esta ideia. “Descobrimos agora fortes evidências para uma origem magnética destas explosões e as nossas observações nos dão pistas sobre a geometria do processo. Os novos dados são extremamente úteis na construção de uma interpretação teórica destes eventos”, diz a co-autora Monika Mościbrodzka da Universidade Radboud.
O ALMA permite aos astrônomos estudar emissão de rádio polarizada de Sagitário A*, a qual pode ser usada para investigar o campo magnético do buraco negro. A equipe utilizou estas observações juntamente com modelos teóricos para aprender mais sobre a formação do ponto quente e o ambiente em que se encontra, incluindo o campo magnético que rodeia Sagitário A*. Esta pesquisa coloca limites mais fortes na forma deste campo magnético do que os conseguidos em observações anteriores, ajudando os astrônomos a descobrir a natureza do nosso buraco negro e seus arredores.
As observações confirmam algumas das descobertas anteriores feitas com o auxílio do instrumento GRAVITY montado no Very Large Telescope (VLT) do ESO, que observa no infravermelho. Tanto os dados do GRAVITY como os do ALMA sugerem que a explosão tem origem em um aglomerado de gás que orbita em torno do buraco negro a cerca de 30% da velocidade da luz no sentido horário no céu, com a órbita do ponto quente quase de frente para nós.
“No futuro devemos ser capazes de seguir pontos quentes ao longo de várias frequências, usando observações coordenadas multi comprimentos de onda, obtidas tanto com o GRAVITY como com o ALMA — o sucesso de tal esforço seria um verdadeiro marco na nossa compreensão da física das explosões no Centro Galáctico”, diz Ivan Marti-Vidal da Universidade de Valência, Espanha, co-autor do estudo.
A equipe espera também conseguir observar diretamente com o EHT os aglomerados de gás, para sondar cada vez mais perto do buraco negro e aprender mais sobre ele. “Talvez um dia estejamos confortáveis o suficiente para dizer que “sabemos” o que se passa em Sagitário A*”, conclui Wielgus.
Mais Informações
Esta pesquisa foi apresentada no artigo intitulado “Orbital motion near Sagittarius A* – Constraints from polarimetric ALMA observations” publicado na revista Astronomy & Astrophysics (https://www.aanda.org/10.1051/0004-6361/202244493).
A equipe é composta por: M. Wielgus (Max-Planck-Institut für Radioastronomie, Alemanha [MPIfR]; Centro Astronômico Nicolau Copérnico, Academia de Ciências Polaca, Polônia; Black Hole Initiative at Harvard University, EUA [BHI]), M. Moscibrodzka (Departamento de Astrofísica, Universidade Radboud, Holanda [Radboud]), J. Vos (Radboud), Z. Gelles (Center for Astrophysics | Harvard & Smithsonian, EUA e BHI), I. Martí-Vidal (Universitat de València, Espanha), J. Farah (Las Cumbres Observatory, EUA; University of California, Santa Barbara, EUA), N. Marchili (Centro Regional ALMA italiano, INAF-Istituto di Radioastronomia, Itália e MPIfR), C. Goddi (Dipartimento di Fisica, Università degli Studi di Cagliari, Itália e Universidade de São Paulo, Brasil) e H. Messias (Joint ALMA Observatory, Chile).
O Observatório Europeu do Sul (ESO) permite que cientistas de todo o mundo descubram os segredos do Universo para o benefício de todos. Nós projetamos, construímos e operamos observatórios de classe mundial no solo - que os astrônomos usam para pesquisar as maiores questões astronômicas da nossa época e levar ao público o fascínio da astronomia - e promover a colaboração internacional em astronomia. Estabelecido como uma organização intergovernamental em 1962, hoje o ESO é apoiado por 16 Estados Membros (Áustria, Bélgica, República Tcheca, Dinamarca, França, Finlândia, Alemanha, Irlanda, Itália, Holanda, Polônia, Portugal, Espanha, Suécia, Suíça e Reino Unido), além do país anfitrião, o Chile, e a Austrália, como parceiro estratégico. A Sede do ESO e seu centro de visitantes e planetário, o Supernova do ESO, estão localizados perto de Munique, na Alemanha, enquanto o deserto chileno do Atacama, um lugar maravilhoso com condições únicas para observar o céu, hospeda nossos telescópios. O ESO opera três locais de observação: La Silla, Paranal e Chajnantor. No Paranal, o ESO opera o Very Large Telescope e o Interferômetro do Very Large Telescope, bem como dois telescópios de rastreio: o VISTA trabalhando no infravermelho e o VLT Survey Telescope de luz visível. Também no Paranal, o ESO hospedará e operará o Cherenkov Telescope Array South, o maior e mais sensível observatório de raios gama do mundo. Junto com parceiros internacionais, o ESO opera o APEX e o ALMA em Chajnantor, duas instalações que observam os céus na faixa milimétrica e submilimétrica. No Cerro Armazones, perto do Paranal, estamos construindo "o maior olho do mundo virado para o céu" - o Extremely Large Telescope do ESO. De nossos escritórios em Santiago, Chile, apoiamos nossas operações no país e nos relacionamos com parceiros e a sociedade chilena.
Links
- Artigo científico
- Fotografias do ALMA
- Nota de imprensa sobre a primeira imagem do nosso buraco negro
- Para jornalistas: inscreva-se para receber as nossas notas de imprensa sob embargo em português
- Para cientistas: tem uma história para nos contar? Fale-nos do seu trabalho de pesquisa
Contatos
Eugênio Reis
MCTI
Rio de Janeiro, Brazil
e-mail: eug.reis@gmail.com
Maciek Wielgus
Max Planck Institute for Radio Astronomy
Bonn, Germany
Tel.: +48 602417268
e-mail: maciek.wielgus@gmail.com
Monika Mościbrodzka
Radboud University
Nijmegen, The Netherlands
Tel.: +31-24-36-52485
e-mail: m.moscibrodzka@astro.ru.nl
Ivan Martí Vidal
University of Valencia
Valencia, Spain
Tel.: +34 963 543 078
e-mail: i.marti-vidal@uv.es
Jesse Vos
Radboud University
Nijmegen, The Netherlands
Cel.: +31 6 34008019
e-mail: jt.vos@astro.ru.nl
Bárbara Ferreira
ESO Media Manager
Garching bei München, Germany
Cel.: +49 151 241 664 00
e-mail: press@eso.org
Connect with ESO on social media
Este texto é a tradução da Nota de Imprensa do ESO eso2212, cortesia do ESON, uma rede de pessoas nos Países Membros do ESO, que servem como pontos de contato local para a imprensa. O representante brasileiro é Eugênio Reis Neto, do Observatório Nacional/MCTIC. A nota de imprensa foi traduzida por Margarida Serote (Portugal) e adaptada para o português brasileiro por Eugênio Reis Neto.The ruse with the dirty bomb: A sign of Putin's weakness?
As Ukraine presses its counteroffensive against Russian occupying forces in the south, Moscow’s doing some nuclear muscle flexing, conducting military exercises simulating response to a nuclear attack and accusing Kiev of planning to launch one. Russian forces in the southern region around Kherson have been moving injured people and civilians out of the city, but it’s unclear whether the troops themselves are bracing for battle or preparing to flee. Meanwhile, Moscow claims Kiev’s getting ready to detonate a “dirty” bomb laced with radioactive material – a charge Ukrainian leaders deny, saying Russia’s describing its own intentions.
"Not Only For Defence But" | Why Ukraine Wants More Troops Against Russi...
Ukraine plans to draft more soldiers for its ongoing counter-offensive campaign against Russia, as per a top official. The mobilisation would likely extend into the next year and anyone attempting to dodge the summons could face up to five years in prison. Russia and Ukraine are digging in for a months-long grind in the war as winter is set to make fighting conditions tougher. Meanwhile, Russia is bracing for a Ukrainian counteroffensive in the Kherson region.
Moscú y Kiev se acusan mutuamente de planificar el uso de una “bomba suc...
Ocho meses tras la invasión, Ucrania sigue presentando una férrea resistencia obligando incluso a las fuerzas rusas a retirarse. Entretanto Moscú ha denunciado que Ucrania pretende emplear una “bomba sucia” con contenido radioactivo. A lo que el presidente Zelenski responde que precisamente esos son los planes del Kremlin. La "bomba sucia" en Ucrania: ¿señal de debilidad de Putin?
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Russian tactics on eastern front 'crazy', says Ukrainian President Zelen...
Ukrainian President Volodymyr Zelensky has accused Russian commanders of "craziness" in their efforts to capture the eastern town of Bakhmut.
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Despite a looming Ukrainian advance on the key city of Kherson, Mr Zelensky said the attacks continued in force.
Taking the town would be a symbolic victory for Russia.
Wednesday, October 26, 2022
Tehran sanctions DW Farsi for coverage of Iran protests l | DW News
https://italiamiacasa.blogspot.com/2022/10/tehran-sanctions-dw-farsi-for-coverage.html
Iran added the Farsi service of DW to a list of sanctioned institutions and individuals on Wednesday. The latest sanctions also included two German companies and two editors at German newspaper Bild.
DW is Germany's international broadcaster. Its Farsi service operates from Bonn, Germany.
Iran's Foreign Ministry announced the sanctions in a statement, accusing those listed of "supporting terrorism." Those sanctioned are subject to a travel ban and any property or assets in Iran would be confiscated.
Iran often describes protesters as "terrorists."
Iran has been gripped by nationwide protests since the death in custody of 22-year-old Kurdish woman Jina Mahsa Amini on September 16.
DW Director General Peter Limbourg said the sanctions would not affect the organization's coverage of Iran, "The fact that we appear on such a list now will not stop us from providing our users in Iran with reliable information."
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Tuesday, October 25, 2022
Análise: Moraes manda Bolsonaro provar fraude em inserções
O presidente do Tribunal Superior Eleitoral (TSE), Alexandre de Moraes, deu 24 horas para a campanha de Jair Bolsonaro (PL) apresentar provas sobre possíveis fraudes na propaganda eleitoral. Os analistas de política da CNN Basília Rodrigues, Gustavo Uribe e o comentarista Alexandre Borges avaliaram a decisão
What Joe Biden Said On Indian-Origin Rishi Sunak Becoming Next UK's New PM
The President of the United States, Joe Biden, reacting to the ascent of Rishi Sunak as the UK’s first Indian-origin prime minister, said it was “pretty astounding” and a “ground-breaking milestone”.
“I think tomorrow when he (Rishi Sunak) goes to see the king. Pretty astounding. A ground-breaking milestone. And it matters. It matters,” Biden said, acknowledging the immigrant Indian community’s achievements.
Ukraine: German President Steinmeier arrives in Kyiv | DW News
German President Frank-Walter Steinmeier arrived in Kyiv on Tuesday. It is Steinmeier's first trip to Ukraine since the Russian invasion on February 24.
"It was important to me, especially now in this phase of air attacks with drones, cruise missiles and rockets, to send a message of solidarity to the Ukrainians," he added.
The president also said that he was "very happy" to be in the country, and praised Ukrainians' "courage, fortitude, and unyieldingness."
The German president had been expected in Ukraine last Thursday. However, the trip was canceled at short notice due to the tense security situation, as Kyiv was bombed by Russian missiles and drones.
Meloni: "Grazie a donne che hanno costruito scala che mi permette di rom...
(Agenzia Vista) Roma, 25 ottobre 2022
Meloni: "Grazie a donne che hanno costruito scala che mi permette di rompere tetto cristallo"
"Grazie a quelle donne che hanno costruito quella scala che oggi permette a me di rompere il tetto di cristallo". Così il Presidente del Consiglio dei Ministri Giorgia Meloni in Aula.
Monday, October 24, 2022
View of Downing Street as new Prime Minister announced today | Ris...
LIVE: View of Downing Street as new Prime Minister announced today. Rishi Sunak is on the verge of getting the keys to Downing Street today after Boris Johnson dramatically dropped his Tory leadership bid. Mr Sunak could be named as the new PM as early as 2.15pm, with his sole remaining rival Penny Mordaunt struggling to reach the threshold of 100 nominations needed to trigger a run-off. The former Chancellor has received public backing from over 160 Tory MPs - and is racking up more numbers as prominent supporters of Mr Johnson jump on the bandwagon. He would be the country's first non-white premier.
🔴 Al Jazeera English | Live
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Reaching more than 270 million households in over 140 countries across the globe, our viewers trust Al Jazeera English to keep them informed, inspired and entertained.
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Why Russia accuses Ukraine of planning to use a radioactive bomb | DW News
In his daily video address, Ukrainian President Volodymyr Zelenskyy dismissed Moscow's claims that Ukraine was preparing provocations with the use of a "dirty bomb", as suggested by Russia's defense minister during telephone calls with NATO counterparts.
"If Russia calls and says that Ukraine is allegedly preparing something, it means one thing: Russia has already prepared all this. I believe that now the world should react as harshly as possible," Zelenskyy said.
The Ukrainian president also said that only Russia was capable of using nuclear weapons in Europe.
"If anyone can use nuclear weapons in this part of Europe — it can be only one source — and that source is the one that has ordered comrade Shoigu to telephone here or there," Zelenskyy said.
Earlier on Sunday, Ukraine's Foreign Minister Dmytro Kuleba denounced Moscow's claims as "absurd" and "dangerous". "Russians often accuse others of what they plan themselves," he added.
Sunday, October 23, 2022
Boris Johnson abandons bid to return as UK Prime Minister - BBC News
Boris Johnson has pulled out of the race to replace Liz Truss as the next UK Prime Minister and leader of the Conservative Party.
Mr Johnson stepped down as Prime Minister in July 2022 after a series of political scandals and the loss of confidence of his own members of Parliament.
However Liz Truss, his replacement as Prime Minister, has also been forced to step down after her plans for tax cuts and unfunded borrowing led to turmoil in the financial markets.
Mr Johnson had been campaigning to return as Prime Minister but has now admitted that he would not be able to unite his party.
His decision means that Rishi Sunak, the former Chancellor, is now seen as the leading candidate to be the next Prime Minister.
Reeta Chakrabarti presents BBC News at Ten reporting by political editor Chris Mason.
Biden's cognition under question after latest sit-down interview
FOX News Channel (FNC) is a 24-hour all-encompassing news service delivering breaking news as well as political and business news. The number one network in cable, FNC has been the most-watched television news channel for 18 consecutive years. According to a 2020 Brand Keys Consumer Loyalty Engagement Index report, FOX News is the top brand in the country for morning and evening news coverage. A 2019 Suffolk University poll named FOX News as the most trusted source for television news or commentary, while a 2019 Brand Keys Emotion Engagement Analysis survey found that FOX News was the most trusted cable news brand. A 2017 Gallup/Knight Foundation survey also found that among Americans who could name an objective news source, FOX News was the top-cited outlet. Owned by FOX Corporation, FNC is available in nearly 90 million homes and dominates the cable news landscape, routinely notching the top ten programs in the genre.
Iran : une nouvelle révolution ? • FRANCE 24
Les femmes, les jeunes, les minorités… Beaucoup manifestent aujourd’hui en Iran. Et ce, depuis plus d’un mois. Un soulèvement inédit à bien des égards et qui fait trembler le régime des mollahs. Est-ce une nouvelle révolution qui s’annonce ? L'invitée de cette émission est Chowra Makaremi, anthropologue.
Boris Johnson And Rishi Sunak Negotiations | UK Prime Minister Race | Un...
Boris Johnson And Rishi Sunak Negotiations | UK Prime Minister Race | United Kingdom Politics News
Former UK Prime Minister Boris Johnson is back in the UK as the race for the leadership of the ruling Conservative Party gathers pace.
Johnson and his family landed back at Gatwick airport on Saturday after cutting short their holiday in the Dominican Republic.
Johnson, who was ousted by ethics scandals just three months ago, on Friday jockeyed to make a comeback and replace outgoing Prime Minister Liz Truss.
He has not publicly declared he is running, but a political ally who spoke with him told Sky News he is "up for it" and bookmakers have made him one of the favorites.
Dominic Raab, former deputy prime minister in Johnson's government, on Saturday warned that Johnson could be "distracted" by the party gate probe if he were to become prime minister again.
The rapid downfall of Truss threw the country's leadership into disarray at a time of severe economic challenges.
The governing Conservative Party has ordered a lightning-fast race that aims to finalise nominations Monday and install a new prime minister, its third this year, within a week.
Leading the pack in lawmakers' support, though yet to publicly declare, is former Treasury chief Rishi Sunak, who was previously runner-up to Truss.
He had repeatedly warned Conservatives that Truss' tax-cutting plans would be disastrous - as proved to be the case.
The former hedge-fund manager's supporters consider him a steady hand for an ailing economy.
#sunak #boris #ukprimeminister
n18oc_politics
Saturday, October 22, 2022
En direct : Zelensky accuse Moscou d'une "attaque massive" avec 36 tirs ...
Le président ukrainien a accusé la Russie d'une "attaque massive" avec 36 tirs de roquette sur son pays dans la nuit de vendredi à samedi. Des infrastructures énergétiques ukrainiennes ont été à nouveau la cible de frappes dans les régions d'Odessa, de Kirovohrad et de Loutsk. D'autres régions ukrainiennes ont quant à elles fait état de problèmes d'électricité. Suivez heure par heure les derniers développements de la guerre en Ukraine.
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