Galaxy position and velocity map. Shows arrow position and velocity data for 224 for budgets used to model the Miraway Galaxy. The solid black lines show the position of the spiral weapon of the galaxy. Colors indicate groups of objects with similar hands. The background is a simulation image. Credit: NAOJ
Earth just got faster at 7 km / s (16,000 miles) and close to 2000 light-years supermassive Black hole In the middle of Milk Ganga Galaxy. But don’t worry, this doesn’t mean our planet is sinking into a black hole. Instead, the changes are the result of a better model of the Milky Way galaxy based on new observational data, including a list of objects observed over a period of more than 15 years by the Japanese radio astronomy project Veera.
Vera (VLBI Exploration of Radio Astrometry, the “VLBI” path to a very long baseline interferometry) began in 2000 to map three-dimensional velocity and spatial formations in galaxies. To collect data from radio telescopes scattered across the archipelago of Japan, VERA uses a technique called interferometry to achieve the same resolution as a telescope with a diameter of 2300 km. Size Accuracy Achieved with this resolution, 10 micro-arcseconds, is so sharp in theory to solve the United States penny placed on the surface of the moon.
Since the Earth galaxy is located inside the galaxy, we cannot turn back and see what the galaxy looks like from the outside. Accurate measurement of astrometry, position of objects and motion is an important tool for understanding the overall structure of a galaxy and our location in it. This year, the first Veera Astrometry catalog was published with data for 99 for Buzzets.
Based on recent observations by Vera Astrometry Catalog and other groups, astronomers created a location and velocity map. From this map they calculated the center of the galaxy, the point at which everything revolves. Maps indicate that the center of the galaxy, and the supermassive black hole that inhabits it, is located 25,800 light-years from Earth. This is closer to the official value of 27,700 light-years adopted by the International Astronomical Union in 1985. The velocity component of the map indicates that the earth is 227 km. Travels at a speed of / cm as it orbits around the lactic center. This is faster than the official value of 220 km / sec.
Now VIRA hopes to observe more object objects, especially objects near the central supermassive black hole, to improve the structure and motion of the galaxy. As part of this effort, Vera will participate in EAVN (East Asian VLBI Network), a radio telescope based in Japan, South Korea and China. By increasing the number of telescopes and maximizing the isolation between telescopes, EAVNs can also achieve greater accuracy.
“First Veera Astrometry Catalog” by Vera Collaboration et al. Japan appeared in the publications of the Astronomical Society of Japan in August 2020.
