Saturday , May 28 2022

astronomers have discovered the "twin" of the Sun – National Geographic


Most stars are born in groups of thousands: they are made up of giant clouds of gas and dust, increasing their density and falling into plasma beads, which then become stars. Scientists believe that the Sun, the star of our solar system, was formed 4.57 billion years ago.

According to astronomers, up to 85% of all stars can be binary systems (or even triple or quad.). In addition, more than half of the known analogs of the Sun are in binary systems.

The sun does not currently have a pair – and this seems weird: scientists believe our star used a pair. A recent study, by the way, suggested that most stars, if not all, are born with a twin.

It is known that the sun really has relatives. They are very hard to detect, given the number of stars in the Milky Way and the fact that the possible twins of the sun are scattered widely across the galaxy. Until now, scientists have only discovered a few candidates for such stars.

In a new study by experts in Portugal, not only a relative of the Sun was discovered, but, as observed, a "special" star, just like ours. We are talking about star 186302, which is about 184 light-years away from us – a yellow dwarf just slightly larger than the Sun, having about the same surface temperature and brightness. This star also has a surprisingly similar Sunlike composition and has been formed, according to calculations, some 4.5 billion years ago. This is even more consistent with the Sun than the star HD 162826, identified as a star of our star in 2014.
Twin Sun.jpg
Here it is, shining right in the middle!

Scientists still do not know exactly where the sun was formed, so the study of possible sun relatives can give a new key to understanding the history of our solar system. In addition, the only known place of life in the Universe is the Solar System: it means that the size, age, temperature, brightness and chemical composition of the Sun are suited to the appearance of life – in the form we know. Considering this, studying the sun relatives has another important meaning: probably the planets around them have developed their lives as well?

In the future, researchers are hoping to find out if there are any detected HD 186302 planets. It is particularly interesting that this star, similar to the Sun, has a rocky planet in the habitable area: maybe specialists will find "Earth 2.0 in orbit on Sun 2.0"?

The study was published in the journal Astronomy & Astrophysics, shortly about the results of the work reported by ScienceAlert.

Source link