The Milky Way's original nucleus was found in the constellation Sagittarius, according to new data from the Gaia spacecraft. This ancient stellar population is thought to be the core around which the rest of the galaxy formed more than 12.5 billion years ago. This discovery provides new insights into the formation and evolution of our galaxy.
A new study using data from the European Space Agency’s Gaia satellite has found a previously hidden population of old stars in the center of our Milky Way galaxy. This is the first time that such a large population of old stars has been found in the
The heart of the Milky Way, its ancient round protogalaxy, is a stunning sight. It spans nearly 18,000 light years and contains an estimated 100 million times the mass of the sun in stars. That's about 0.2 percent of the Milky Way's current stellar mass
This study provides new insights into the early stages of the Milky Way's development. According to Vasily Belokurov, an astronomer at the University of Cambridge who was not involved in the work, "Not much is really known about this period of the Milky Way's life." The new study gives us a more comprehensive view of this population. "We've seen glimpses of this population before,"
The majority of stars in the Milky Way's central region are rich in metals, due to the fact that these stars originated in a densely populated region of space where earlier generations of stars had enriched the area with metals through supernova explosions. However, a team of researchers led by Dr. Rix wanted to find the exceptions to this rule; stars that are so metal-poor that they must
The search turned up a new population of low-metallicity stars clustered near the galaxy’s center. Most of these stars are older than the sun, and their low metallicity suggests that they are the remnants of the very first generations of stars to form in the Milky Way. The new data also allowed
When studying the formation and evolution of galaxies, astronomers often look to the stars within them for clues. In our own Milky Way galaxy, for example, stars can be classified according to their chemical composition, with those containing higher proportions of heavy elements (such as iron) thought to be younger than those with fewer heavy elements (known as metal-poor stars). Now, a team of astronomers has used this technique to identify
The original core of the Milky Way galaxy is home to some of the oldest stars in the galaxy, which are thought to be more than 12.5 billion years old. This part of the galaxy formed when several large clumps of stars and gas came together long ago, before the Milky Way's first disk
The protogalaxy is thought to be the densest and most massive object in the early universe. It is also one of the most compact galaxies known. These two characteristics may be related. The high density of the protogalaxy may have made it more resistant to gravitational forces that would
The new data on the protogalaxy are fascinating, capturing the Milky Way's initial spin-up - its transition from an object that didn't rotate into one that now does. The oldest stars in the proto-Milky Way barely revolve around the galaxy's center but dive in and out of it instead, whereas slightly younger stars show more and more movement around the galactic center. This is the Milky Way trying to become a disk galaxy, as Belokurov reported in
The Milky Way is a giant spiral galaxy that is estimated to be about 13.6 billion years old. Our solar system is thought to be about 4.6 billion years old and is located about 26,000 light years from the center of the Milky Way. The Milky Way is thought to have started out as a small protogalaxy that gradually grew over time as it