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The Future of ALMA

In this early footage, Shep Doeleman, principal investigator of the ALMA Phasing Project and assistant director of MIT's Haystack Observatory, discussed the exciting science that awaited the ALMA-enabled Event Horizon Telescope (EHT), launched in 2009. This ambitious project, forged through international collaboration, was designed to capture the first images of a black hole. The endeavor linked together some of the most impressive observatories around the world, including ALMA, and combined their individual collecting areas to expand on all of their already powerful capabilities. The end result is an array of seven individual radio telescopes spread over four continents and linked together to form a new, Earth-sized radio telescope. In April 2019, EHT scientists published results of the first direct visual evidence of a black hole: an image of the supermassive black hole at the center of Messier 87 (M87), a giant elliptical galaxy 55 million light-years from Earth. Though astronomers have long studied the impact of black holes on the universe, no one had ever imaged the actual point of no return, where matter and energy cannot escape a black hole — the so-called event horizon. The Event Horizon Telescope combined ALMA's super sensitive observations with observations taken at other millimeter wavelength telescopes to peer, for the first time, through the veil of gas around this unknown limbo of spacetime where all the established laws of physics are pushed to their limits. The EHT reached unprecedented resolution and sensitivity in order to achieve this feat, and ALMA was critical to the project; without it, that region around the black hole could never have been seen. The next Event Horizon Telescope target is Sagittarius A*, the supermassive black hole at the center of the Milky Way, so there will no doubt be more exciting results from the EHT and ALMA in the future. Read more about the EHT story and the connection between radio astronomy and black holes: https://public.nrao.edu/news/2019-eht... Discover more about The Atacama Large Millimeter/submillimeter Array (ALMA) on our website: https://public.nrao.edu/telescopes/alma/ Take a virtual tour of the observatory and its surroundings: https://public.nrao.edu/explore/alma-...