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The Milky Way could be higher after research on the Chinese telescope
- Publisher:
- 18:36:05 2018-07-03 / Xinhua
BEIJING, July 3 (Xinhua) – Astronomers from different countries recalculate the size of the Milky Way using data from a Chinese telescope.
For decades, astronomers have estimated that the radius of the galaxy is about 50,000 light-years and the distance to the Sun from its center would be about 25,000 light-years. There is a clearly defined boundary at the edge of the galactic astral disk, and from there the number of stars falls sharply.
But in recent years, more young stars have been discovered beyond this edge, indicating that the astral disc would extend further than we thought, according to the data compiled by a telescope located in Xinglong District, Hebei Province, North China.
The optical fiber spectroscopic telescope (LAMOST), of the National Astronomical Observatory (NAO) of the Chinese Academy of Sciences, can observe nearly 4000 celestial bodies at a time, and has made valuable contributions to the study of the structure of the Milky Way.
At the end of last year, astronomer OAN Liu Chao counted the stars at the edge of the galaxy using LAMOST data and drew a sample of the outer ring of
Liu discovered that, although there are fewer stars, these do not disappear completely at 50,000 light-years from the galactic center, but they can still be found at 62,000 light years
. Spanish scientists, participated in Liu's investigation. On the basis of their discoveries, they calculate that the radius of the galactic astral disk could reach 100,000 light-years.
Chinese scientists have established the world's largest stellar spectra databank based on LAMOST observations. better understand the Milky Way and study the evolution of galaxies and the universe. End
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