At the end of 2023, 59 nuclear power reactors with a total capacity of 61.1 GW(e) were under construction in 17 countries.
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Neutrinos are elementary particles emitted in nuclear reactions like fission, fusion and radioactive decay. The sun emits vast numbers of neutrinos which can pass through the earth with little or no interaction.
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An Einstein ring is created when light from a more distant galaxy or star is bent when it passes a closer massive object closer to Earth. Due to the gravitational lensing, the light from the distant galaxy appears as a arc or a ring.If the source, lens object and observer are all in perfect alignment the light appears as a ring.
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Some cosmic rays have an almost unbelievable energy. The source of such high energy particles is still a mystery – suggested explanations include young neutron stars and active galactic cores where matter falls into black holes.
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Nuclear fusion in the Sun consumes about 6 million tonnes of hydrogen per second. Despite this enormous consumption of hydrogen, the sun has enough hydrogen to burn at this rate for the next 4 billion years.
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Sagittarius A*, abbreviated as Sgr A*, is the supermassive black hole at the Galactic Center of the Milky Way. The object was first detected in 1974 as a bright and very compact astronomical radio source. It has now been imaged by a world-wide network of radio observatories and its mass estimated observations of the orbits of nearby stars using very large infrared telescopes.