100 new galaxy were discovered by Chinese

Over 100 new open clusters were discover by Chinese astronomers:

Astronomers at the Shanghai Astronomical Observatory (SHAO) in China have discovered 101 new open clusters in the Milky Way galaxy by studying the data from the ESA’s Gaia spacecraft. 100 new galaxy were discover by Chinese.

The discovery was describ in an article post on the arXiv pre-print repository on December 21. Empty clusters (OCs) are collections of stars that are only weakly gravitationally connected to one another and generated from the same massive molecular cloud.


Scientists are still seeking more of these star clusters in the Milky Way. For us to comprehend the origin and evolution of our galaxy, more study of them may be essential.

The discovery of 101 additional OCs in the solar neighbor hood has now been report by a team of astronomers led by Qin Songmei of SHAO. The finding  made using the data from Gaia’s Data Release 3 and the clustering methods pyUPMASK and HDSBSCAN (DR3).

“In this work, we conducted a methodically blind search of OCs at Galaxy latitudes |b| 30 within 500 pc of the sun neighborhood by selecting various slice box sizes in various distance grids using Gaia DR3 data.

“Our manual inspection-based categorization mixes some duplicate or incompletely reported clusters in addition to noting novel clusters,” the scientists clarified.

324 open clusters were found by Songmei’s team, 101 of which had never been report before. As a result of the discovery, the number of known nearby (around 1,600 light years from Earth) OCs has nearly quadrupled. 100 new galaxy were discover by Chinese.

By closely comparing the geographical distribution and other characteristics with the prior cluster database, the parameters of the 223 known clusters were updat.

There are 19 OC couples with a similar origin and age differences of under 30 million years among the newly discovered open clusters. Additionally, there are three groups of triple OCs that are separatfrom one another by less than 65 light years and have an age difference of less than 10 million years.


These triplets are  originat from a single molecular cloud, according to scientists. According to the researchers, their “slicing” method allowed them to find several neighboring OCs with huge spatial scales for the first time.

They emphasized that this makes their approach particularly efficient for looking for adjacent OCs with a wide geographical dispersion. It also demonstrated the extensive exterior structure present in many open clusters.

The paper’s authors stated in their final notes that further thorough investigations are requir to clarify the characteristics of the recently discovered OCs, including their mass functional and dynamic states.

To ascertain the dynamical and molecular development of these clusters, further spectroscopy data for the component stars would, in their opinion, be crucial.

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