Planet of Ross 128 b, which opened in October last year, more resembles a scientist the Earth.
Ross 128 b immediately after the discovery, astronomers seemed very promising from the point of view of colonization. First, a celestial body like the Earth by weight. Secondly, it revolves around a “quiet” stars, not prone to catastrophic outbreaks. Finally, it is only 11 light years, which is almost a record. However, until recently, was unknown the chemical composition and the radius of the planet and the climate.
A new study by research of the Carnegie institution in the United States provided the necessary information. Experts have studied the chemical composition of the parent star Ross 128 — inactive red dwarf. He has much to say about the planet, because the star and its satellites are formed from the same protoplanetary cloud.
In particular, the researchers measured the contents in a star of eight chemical elements: carbon, oxygen, magnesium, aluminum, potassium, calcium, titanium and iron.
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Usually as a measure the content of elements heavier than helium, astronomers use the iron concentration. It turned out that on this key parameter dwarf Ross 128 is similar to the Sun. But the ratio of iron and magnesium suggests that the iron core of the planet even more than Earth.
Knowing the mass and the approximate chemical composition Ross 128 b, the scientists determined the radius of the planet. It turned out that it surpasses the earth in not more than 1.7 times.
The composition and the radius of the Ross 128 b helped to determine the reflectivity and thus to estimate the temperature. Calculations confirmed that the planet’s climate is moderate (in the range of 20-50 degrees Celsius) and allows the presence of water and therefore life.