According to planetary scientist Haiyang Wang, lead author of the study, planets like Earth It is very difficult to detect with modern technology and if detected, very difficult to find signs of life.
But given the nature of some nearby star systems such as Proxima Centauri (4.2 light-years) or Alpha Centauri AB (4.37 light-years away), there are almost certainly multiple copies of Earth. .
Therefore, the authors decided to create a “hypothetical Earth” with certain properties, which future research can rely on to look for signs of a match.
They call their planet -Cen Earth, which is assumed to orbit the star pair Alpha Centauri AB.
According to Science Alert, based on the composition of this star, Earth -Cen would be full of rock-forming elements such as magnesium, silicon, iron… and many volatiles to form the world of life, such as carbon, oxygen.
-Cen Earth should have an Earth-like composition and structure with a rocky mantle rich in silicate minerals, diamonds, and graphite, capable of storing water.
The planet’s iron core may be slightly larger than Earth and less geologically active, perhaps without plate tectonics, making it more similar to Venus than Earth. This may affect its habitability but does not mean that life cannot exist in other ways as Venus itself is also suspected by NASA to have life.
The atmosphere of the early Earth-Cen would resemble that of Earth during the Paleozoic, when ancient microorganisms first appeared. This atmosphere will be flooded with methane, carbon dioxide, and water.
Since Alpha Centauri AB is 1.5 to 2 billion years older than the Sun, it is possible that Earth-Cen will be older than Earth and have given sufficient time for more advanced life forms to develop, despite Plate Tectonic obstacles.
According to the team, we have until 2035 to search for Earth -Cen, as Alpha Centauri A and B, aka Rigil Kentaurus and Toliman, will grow further and further in orbit until then, reducing light. Then the telescope will not be dazzled and have the opportunity to find small rocky planets like Earth.
at Blogtuan.info – Source: Soha.vn – Read the original article here
