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WeatherTalk: Astronomers have now seen the black hole at the center of our galaxy

The image consists of an array of radiation surrounding an invisible, black disc.

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FARGO — Astronomers using the massively impressive Event Horizon Telescope, a global network of radio telescopes, have found and made computer imagery of Sagittarius A, the black hole at the center of our Milky Way galaxy. Because the Event Horizon Telescope uses radio waves, it does not "see" in the sense that people see things. Instead, the astronomers have used telemetry from these radio telescopes to measure certain, specific electromagnetic waves to map the object, which can be graphed onto an image generated by a computer.

These images of Sagittarius A amount to an array of radiation surrounding an invisible (black) disc. The black hole is very dynamic, changing noticeably in size over a time scale of a few hours. The next step in this project will be an attempt to generate a movie of the black hole in order to further study its physics, which is vastly different from the rather mundane physics of simple things like weather.

Related Topics: WEATHER
John Wheeler is Chief Meteorologist for WDAY, a position he has had since May of 1985. Wheeler grew up in the South, in Louisiana and Alabama, and cites his family's move to the Midwest as important to developing his fascination with weather and climate. Wheeler lived in Wisconsin and Iowa as a teenager. He attended Iowa State University and achieved a B.S. degree in Meteorology in 1984. Wheeler worked about a year at WOI-TV in central Iowa before moving to Fargo and WDAY..
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