Tuesday , June 22 2021

Astronomers believe they have found a lost twin of our Sun and will now be looking for Earth Portugal | Planets



A team of scientists has discovered a star that is far from 184 light-years old and may be the lost twin of our Sun.

It's called HD 186302, and it's almost certainly a brother of our star home, according to the Institute of Astrophysics and Space Science (IA) of Portugal.

A Twin Brother has long since left our Sun?

There are reasons to believe that the stars are born in huge concentrations of dust and gas, which are known as stellar clusters or nurseries.

Credit at http://simbad.u-strasbg.fr/

Most stars are born in pairs. Some are even born in groups of three or four and a recent study ensures that all stars are born at least in pairs. In fact, 50% of the stars similar to our Sun are found in binary systems, according to Science Alert.

The invention of solar brothers and sisters, or stars formed in the same cluster as the Sun, will provide information on the conditions of the birthplace of the Sun.

But the Sun's birth clusters collapsed long ago, and its members, solar brothers, were scattered all over the Milky Way.

Several attempts were made to find solar brothers and sisters, but to date only four credible candidates have been identified: HIP 21158, HIP 87382, HIP 47399 and HIP 92831.

In this new study, about 17,000 stars were studied, from which they chose 55 stars with a certain range of stellar metals, according to an IA study published in the journal Astronomy and Astrophysics.

Then we chose 12 stars whose average abundance and metallicity are very similar to those of the Sun (with ± 0.03 decks).

The starry ages of these 12 candidates for a brother and sister, with chemical refusals, were allowed to reduce the 12 stars to a sample of 4 candidates whose ages are similar to those of the Sun.

And, finally, of the selected four stars, only the HD 186302 has an outbreak error of less than 1 Gyr (a star for the estimation of star age). The other three candidates have errors over the age of 3 Gyr.

Dynamic solar observatory of ASA (SDO). NASA / SDO

The similarities between the two stars are so much that, although they are not sisters, the discovery of HD 186302 raises many questions:

Will there be any planets around it? Will any of these planets be in a living area and there will be water?

If they are really brothers, the HD 186302 could take part of the planetary material with them to form their own Earth.

Therefore, we will have to wait to see if there is life in that distant brother of our Sun or not.


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