Earth is about 2,000 light years closer to the supermassive black hole of the Milky Way than before


A new map of the Milky Way, created by Japan’s National Astronomical Observatory, shows that the Earth is spiraling rapidly and that the supermassive black hole in the center of our galaxy is about 2,000 light years earlier than previously thought.

In 1985, the International Astronomical Union announced that the Earth was 27,700 light years away from a black hole, named Sagittarius A *. But a 15-year analysis through the Japanese radio astronomy project VERA found that the Earth is actually only 25,800 light years away. They also found that the Earth is moving 7 km / h faster than before.

Sagittarius A * and such black holes are called “supermassive” for a reason. Billions of times more extensively Than the sun.

But the NAOJ said there is no need to worry, as the latest figures do not indicate that the planet is “moving towards a black hole.” It simply means that “the Milky Way is a better model of the galaxy.”

20201126-Mizusawa-fig-full.jpg
Map of the position and velocity of the Milky Way Galaxy. Arrows show position and velocity data for 224 objects for the model of Milky Way Galaxy. The solid black lines indicate the position of the spiral arms of the Galaxy. Colors indicate groups of objects belonging to the same hand. The background is a simulation image.

NAOJ


Using the Vera Astrometry Catalog, scientists created a position and velocity map that excludes the center and inner objects of the Milky Way galaxy. The first VERA Astrometry catalog was published this year and contains data for 99 items.

Positioning indicates that the Earth revolves around the galactic center, where the black hole is located, at 227 km / s. Originally astronomers believed that the orbit was at a speed of 220 km / s.

NAOJ said in a press statement, “Because the Earth is located inside the Milky Way Galaxy, we cannot step back and see what the Galaxy looks like from the outside.” “Astrometry, an accurate measurement of the position and speed of objects, is an important tool for understanding the overall structure of the Galaxy and our place in it.”

VERA, Very Long Baseline Interferometry Exploration of Radio Astrometry, was created in 2000 and uses interferometry to collect data from radio telescopes located throughout Japan. The NAOJ said that through the project, scientists can make resolutions similar to a 2,300 km diameter telescope, which is “quite fast in theory to resolve the United States peony located on the lunar surface.”

NAOJ scientists are hoping to collect data on even more objects, which are closer to Dhanu A *.

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