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Reconstructed the origin of the empty bubble that surrounds us VIDEO

2022-01-14T08:52:54.336Z

The Solar System is located in a huge empty bubble, produced by the explosion of a series of 15 supernovae that began 14 million years ago and which has progressively cleared the region of space, about 1,000 light years in diameter, of which ours planet occupies the center almost perfectly. A research group from the Harvard & Smithsonian was able for the first time to reconstruct in detail the origin of the portion of the Milky Way where the Earth is located thanks to data from the European space observatory Gaia. The results are published in the journal Nature (ANSA)



The Solar Support is located in a huge empty bubble, produced by the explosion of a series of 15 supernovae that began 14 million years ago and which has progressively cleared the region of space, about 1,000 light-years in diameter, of which our planet occupies the center almost perfectly. A research group from the Harvard & Smithsonian was able for the first time to reconstruct in detail the origin of the portion of the Milky Way where the Earth is located thanks to data from the European space observatory Gaia. The results are published in the journal Nature.

It has been known for decades that the Sun, and the entire Solar System, are located almost perfectly in the center of a particular empty region, almost free of gas or dust clouds, 1,000 light years wide while at the borders there are many gas-rich regions. and from which new stars originate. The formation of this void, known as the local bubble, has so far been unclear, but thanks to the data obtained in recent years by Gaia, the mission of the European Space Agency (ESA) created to make an accurate map of all the stars and the objects of the Milky Way, and with the help of sophisticated simulations, it was finally possible to reconstruct their history.

"We calculated that 15 supernovae took place and formed the local bubble that we observe today," said Catherine Zucker, who led the study.

A series of gigantic explosions, which began 14 million years ago, pushed gas dust out and thus cleaning the entire area.

The dust then concentrated in some points at the edge of the bubble, giving rise to sites for the formation of new stars.

Only 5 million years ago the Sun, in its movement around the center of the galaxy, entered the bubble and today it is almost perfectly in the center.

According to the authors, their simulation confirms that the galaxy can be imagined as a huge cheese shape with holes, voids are created by supernova explosions, while new stars are created in the cheese surrounding the newly formed holes.

Source: ansa

All tech articles on 2022-01-14

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