at the Paranal Observatory in Chile. Together they took nearly 150 short-exposure pictures of the Milky Way’s central region in the J, H, and Kinfrared bands and examined an area totaling 64,000 square light-years around the Galactic Center. These pictures were then combined via holographic imaging to correct for atmospheric distortion and map the region in much finer detail than ever before.
This is particularly important because luminosity distribution changes gradually for stars that formed around the same time. Given such a distribution, it is possible to reconstruct a history of star formation based on those that formed more than 7 billion years ago, between 2 and 7 billion years ago , and within the last 2 billion years.
Interestingly, the stars were also found to be dispersed and not part of a massive cluster, which suggests they were born in one or more looser stellar associations that rapidly dissolved as they orbited the Galactic Center over several million years. While these results pertain specifically to Sag B1, they could mean that young stars in the Galactic Center were generally born in loose associations that have since dispersed into separate stars.
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