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12 小時前 · Seoul, [b] officially Seoul Special Metropolitan City, [c] is the capital and largest city of South Korea.The broader Seoul Capital Area, encompassing Gyeonggi Province and Incheon Metropolitan City, emerged as the world's sixth largest metropolitan economy in 2022, trailing behind Paris, San Francisco, Los Angeles, Tokyo, and New York, and hosts more than half of South Korea's population.
12 小時前 · It has been a central subject for astronomical research since antiquity. The Sun orbits the Galactic Centerat a distance of 24,000 to 28,000 light-years. From Earth, it is 1 astronomical unit(1.496×108 km) or about 8 light-minutesaway. Its diameteris about 1,391,400 km(864,600 mi), 109 times that of Earth.
12 小時前 · Diagram of an open-type calorimeter used at the New Hydrogen Energy Institute in Japan Cold fusion is a hypothesized type of nuclear reaction that would occur at, or near, room temperature. It would contrast starkly with the "hot" fusion that is known to take place naturally within stars and artificially in hydrogen bombs and prototype fusion ...
12 小時前 · Thorium is a chemical element. It has the symbol Th and atomic number 90. Thorium is a weakly radioactive light silver metal which tarnishes olive gray when it is exposed to air, forming thorium dioxide; it is moderately soft and malleable and has a high melting point. Thorium is an electropositive actinide whose chemistry is dominated by the ...
12 小時前 · In classical antiquity, the Hellenistic period covers the time in Greek history after Classical Greece, between the death of Alexander the Great in 323 BC and the death of Cleopatra VII in 30 BC, [1] which was followed by the ascendancy of the Roman Empire, as signified by the Battle of Actium in 31 BC and the Roman conquest of Ptolemaic Egypt the following year, which eliminated the last ...
12 小時前 · Adam Joseph Copeland (born October 30, 1973) is a Canadian professional wrestler and actor. He is currently signed to All Elite Wrestling (AEW), where he performs under his real name, and is a former two-time AEW TNT Champion. He is currently on hiatus due to injury. Copeland is best known for his 25-year tenure in WWE from 1998 to 2023, where ...
