There are a lot of stars in the center of the Milky Way.
The most accurate three-dimensional map of the galaxy ever compiled, as well as a neural network to probe the chemical compositions of over 2 million stars, has led to the identification of 18,000 stars from our galaxy's infancy.
There are hints of this stellar population found in previous studies.
The results show that there is a tightly bound in situ 'iceberg' whose tips have been recognized before.
There is a puzzle that needs to be reconstructed from the state of the galaxy today.
Populations of stars can be linked based on their motions and chemical composition. The space observatory from the European Space Agency is here.
The satellite has been watching the stars and taking pictures of their motions for a long time.
Measurement that allow for estimates of the stars' metallicity is also taken by the organization.
It's possible that stars with the same composition could have been born in the same place. It can tell us how old a star is, because elements weren't present in the Universe until stars made them.
There wasn't much in the way of diversity after the Bigbang.
The primordial Universe was mostly composed of hydrogen and a small amount of helium. When the first stars formed from clumps in this medium, their hot dense cores started to smash atoms together to form heavier elements, all the way to iron for the most massive stars
When stars reach the limit of their ability to fusion atomic nuclei, they die in a process that sprays the products of their fusion out into space.
Heavy metals are produced by energetic supernovae explosions. These elements are taken up by baby stars as they form.
A star that forms later in the universe is likely to have more metals. Stars with higher metallicity are thought to be younger. Some stars are different than others as they travel around the center of the universe.
It is reasonable to conclude that this group of stars is a group that has been together for a long time.
Rix and his colleagues looked at red giant stars within a few thousand light years of the Milky Way. The light from which they identified 2 million stars was analysed by a neural network.
They found a group of stars with similar ages, abundances, and orbits, suggesting that they were present before the Milky Way was filled with stars.
We know that the oldest stars in the Milky Way are in the center of the universe, but we don't know how many of them are there.
They are metal-poor, very old, and can be found in the center of the universe. The population is remnants of the past.
The seeds of the stars that formed in the early Universe were not fully realized. Three or four of these seeds clumped together to form the core of our home galaxy.
The old heart stars are the generation of stars that formed after the death of the original stars. They're more than 12 billion years old.
Researchers hope to investigate the many questions raised by the discovery.
The distribution of these stars. Is there any special abundance ratios that can tell us more about the earl conditions? Their distribution can tell us a lot about the history of the universe.
Can they lead us to the stars that were smaller, dimmer, and more difficult to find when they formed in the early stages of the Milky Way?
It may be metal-poor and old, but the ancient heart of the Milky Way could be very rich with information about our past.
The research is in a journal.
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