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June 15, 2018

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In 1968, scientists thought they were close to detecting gravity waves

In 1968, scientists thought they were close to detecting gravity waves WAVE RUNNER Joseph Weber (shown in 1969) announced he detected a gravity wave using his aluminum cylinder detector at University of Maryland in College Park. It took nearly five decades for LIGO to confirm that gravity waves can be detected. Gravity waves evidence The long search for gravitational waves … may be in the final lap…. Rotating binary stars or, perhaps, other galaxies like the Milky Way but far beyond it, or the center of the Milky Way itself, are likely sources for gravitational radiation. — Science News, June 22, 1968. Update Although Joseph Weber, a physicist at the University of Maryland, announced a gravity wave detection in 1969, no one could verify his claim. It took almost another 50 years for researchers to directly detect gravitational waves (SN: 3/5/16, p. 24). Those spacetime ripples from two merging black holes, glimpsed by the Advanced Laser Interferometer Gravitatio

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What is IGCSE?

International General Certificate of Secondary Education The International General Certificate of Secondary Education (IGCSE) is an English language curriculum offered to students to prepare them for International Baccalaureate, A Level and BTEC Level 3 (which is recommended for higher-tier students). It is based on the GCE O-Level and is recognised as being equivalent to the GCSE. The IGCSE was developed by University of Cambridge International Examinations. The examination board Edexcel offers its own version, the Edexcel International GCSE. Students begin learning the syllabus at the beginning of year 10(Grade 9) and take the test at the end of year 11(Grade 10). The IGCSE is an international alternative to many popular national curricula. the IGCSE is not a group award or "certificate of education". It is a qualification based on individual subjects of study, which means that one receives an "IGCSE" qualification for each subject one tak

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