This low-mass stars called M dwarf. The size of the star is smaller than the Sun and its light is much less, so approaching the habitable zone.
The habitable zone is the right conditions to support the entry of liquid water on the surface of the orbiting planet. Planets close to their parent star easier for astronomers to find it.
Astronomers find and measure it by studying the light when the planet to shift or when passing through the front of its parent star. In addition, astronomers can measure the influence of gravity on the planet, which is called the method of 'radial velocity'.
In a statement issued by the journal Astrobiology, through computer simulation, the planet close to the low-mass stars tend to have water and atmosphere were burned when formation.
"All the stars are formed in the collapse of giant clouds of interstellar gas, then releases energy in the form of light," said doctoral student, Rodrigo Luger, as reported by ScienceDaily, Friday (12/05/2014).
Furthermore Rodrigo explains, a planet in the star can form within 10 million years. Thus, the planets could be around when the stars are still really bright. This makes it not good for the planet huninya eligibility, the planet is very hot with temperatures exceeding the surface of thousands of degrees.
Extreme conditions on the planet's atmosphere associated with the number of X-rays and ultraviolet light from the star M Dwarf. This raises the upper atmosphere reach thousands of degrees and causes the gas to increase rapidly.
Thus, it makes the planet uninhabitable. "So, a lot of planets in the habitable zone of M dwarf stars have already dried up or foundered due to this process from the beginning. This greatly reduces their chance to really be habitable, "he explained.
Luger also explained, the side effects of the ultraviolet radiation that is able to split water into hydrogen and oxygen atoms. Because according to him, the most important thing for life is oxygen, as on Earth. However, if too much oxygen, can be a negative factor for the continuity of life. He concluded, to track the appropriateness of the planet for life in outer space, is very dependent on the same oxygen on Earth.
