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This map suggested that the center of the Milky Way, and the black hole in it, is located 25,800 light years from Earth. This is closer than the official value of 27,700 light years adopted by the International Astronomical Union in 1985, the National Observatory of Japan said.
In addition, according to the map, our solar system is moving at 227 kilometers per second orbiting the galactic center – that’s faster than the official value of 220 kilometers per second, the statement added.
Because Earth is located inside the Milky Way, it’s difficult to step back and see what the galaxy looks like. To get around this, the project used astrometry, the precise measurement of the position and movement of objects, to understand the overall structure of the Milky Way and the place of the Earth in it.
More precise approach
In August, VERA published its first catalog, containing data for 99 celestial objects. Based on this catalog and recent observations from other groups, astronomers have constructed a position and speed map. From this map, scientists were able to calculate the center of the galaxy, the point around which everything revolves.
VERA combines data from four radio telescopes across Japan. The observatory said that, when combined, the telescopes were able to achieve a resolution that, in theory, would allow astronomers to spot a US penny placed on the surface of the Moon.
To be clear, the changes don’t mean Earth is plunging toward the black hole, the observatory said. Rather, the map identifies more precisely where the solar system has been from the start.
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