Stars are hardly ever born alone. They do this in groups, they can be thousands of members, and in 85% of cases they are accompanied by a twin: another identical star formed at the same time and the same materials, inside the gigantic clouds. of dust and gas that we know as "stellar hotbeds".
After a year of searching, a group of astronomers found the "Twin of the Sun," the star HD 186302 located 184 light years from Earth, which has the same chemical composition of the Sun and was born from the same cloud of gas and dust it gave to light our star.
His discovery was described in the journal Astronomy and Astrophysics by the group of the Portuguese Institute of Astrophysics, led by Vardan Adibekyan.
For years, astronomers have been chasing the Sun's twin, Ansa Isabella Pagano of the National Institute of Astrophysics (Inaf) in Catania, Sicily, said.
Adibekyan revealed: "The Sun does not have a single twin, but many and individualize them can help us understand where it was in the galaxy and under what conditions it was formed."
The researchers examined about 20,000 stars counted by the Gaia satellite of the European Special Agency (ESA) and selected the most similar to the Sun. And among them, the most identical was the HD186302 by dimensions, temperature, composition, brightness and mode. where it moves in space.
The star appears to be covalent to the Sun, which is 4.5 billion years old, but researchers admit that "other studies are needed to better estimate age."