ESA releases a multi-dimensional map of the Milky Way

The European Space Agency released a multi-dimensional map of the Milky Way drawn with the help of the “Gaia” space probe on the 13th. This is the third batch of galaxy exploration data released by ESA and the most detailed galaxy map of the Milky Way to date.

The Gaia space probe is used to make high-precision observations of millions of stars in the Milky Way for clues about mysterious dark matter and dark energy.

The ESA press statement said the data released this time covers the latest data collected by Gaia for about 2 billion stars, including their chemical composition, temperature, color, mass, age, and radial velocity, which is the star’s approach. or away from our speed.

The new data released this time also includes information on more than 800,000 galactic binary star systems and 156,000 asteroids and other celestial bodies in the solar system, as well as information on about 2.9 million galaxies and 1.9 million quasars outside the Milky Way.

In addition, the “Gaia” probe also detected a starquake. It has previously found radial vibrations that cause stars to periodically expand and contract, and this time around, it found strong non-radial starquakes in thousands of stars.

Fran├žois Mignard, the research director of the French National Center for Scientific Research and the head of French scientific research of “Gaia”, said in an interview with the media that the detection data of “Gaia” will help improve the understanding of the history of the Milky Way, but Gaia was originally expected to complete predictions of celestial mechanics based on general relativity, but this task has not been completed because it is difficult to achieve the expected accuracy.

The “Gaia” probe was launched in December 2013 and officially put into scientific observation in July the following year. It will continue to scan the sky until it runs out of fuel in 2025.

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