Scientists found the ancient core using data from the Gaia spacecraft
Astrophysicists investigating the origins of the Milky Way may have discovered our galaxy’s ‘old heart’ — the original, ancient nucleus around which all of its stars and planets grew.
Finding our galaxy's ancient heart began with searching the most crowded region, its central bulge, for the tiny proportion of stars around the same age as the roughly 13 billion-year-old Milky Way. This left researchers with some of the original skeleton of stars around which the Milky Way grew — a population they estimate to be between 50 million to 200 million times as massive as our own sun. As heavier stars die faster than smaller ones, the remaining stars are on average around 1.5 times lighter than the sun, according to the researchers.
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