Japan launches ASTRO-H satellite

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Japan successfully launched a jointly developed space observation satellite on Wednesday tasked with studying mysterious black holes, the country space agency said.The ASTRO-H satellite, developed in collaboration between the agency, NASA and other groups, is set to orbit at an altitude of about 360 miles and observe X-rays emanating mainly from black holes and galaxy clusters.Black holes have never been directly observed, but the announcement on the first detection of gravitational waves earlier this month indirectly added to the evidence that black holes do actually exist.