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Page 156 - பல்கலைக்கழகம் ஆஃப் ஜோகன்னஸ்பர்க் News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Rare star s giant gamma-ray burst GRB 204015A captured close to our home galaxy

Loading video. VIDEO: (90 second, 9.5MB video) On April 15 2020, a giant wave of X-rays and gamma rays lasting only a fraction of a second swept across the solar system, triggering. view more  Credit: Animation: NASA s Goddard Space Flight Center/Chris Smith (USRA/GESTAR). Video: Therese van Wyk, University of Johannesburg. Earth gets blasted by mild short gamma-ray bursts (GRBs) most days. But sometimes a giant flare like GRB 200415A arrives at our galaxy, sweeping along energy that dwarfs our sun. In fact, the most powerful explosions in the universe are gamma-ray bursts. Now scientists have shown that GRB 200415A came from another possible source for short GRBs. It erupted from a very rare, powerful neutron star called a magnetar.

Giant flare that passed Mars came from a neutron star in a galaxy 11 4 million light-years away

Zimbabwe crisis: South Africa can intervene but solution lies with Zimbabweans

Zimbabwe crisis: South Africa can intervene but solution lies with Zimbabweans She is being charged for tweets in which she criticised the government’s poor service delivery. She has been arrested several times for speaking out against abuses of Zimbabweans by their government. © Provided by CapeTalk © butenkow/123rf.com Her arrest is the third in less than a week after authorities took into custody another MDC leader, Job Sikhala, and investigative journalist Hopewell Chin ono. Last year, the Zimbabwean police nabbed several people – some were abducted and tortured – for criticising the government. Africa Melane asked Tapiwa Chagonda (Associate professor of Sociology at the University of Johannesburg) to provide context.

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