Researchers from Cornell University are looking at two planets which are 4.24 light-years away to see if they have life sources. The researchers think there is a strong possibility.
In 2016, scientists discovered Proxima-b, which orbits a red dwarf star named Proxima Centauri.
Proxima-b orbits Proxima Centauri, in Earth days, once every 11.2. The planet had a mass of 1.3 greater than Earth, which suggests its surface may be rocky.
Being a red dwarf star, Proxima Centauri is cooler and smaller than the sun. Even though this is a factor liquid water still might possibly exist on Proxima-b.
Most researches say liquid water is paramount to sustain lifeform development. Since the planet is close to the red dwarf star, there will be radiation which would not make the planet habitable despite having water.
Jack O’Malley James and Lisa Kaltenegger from Cornell University modeled the ultraviolet radiation of four exoplanets: Proxima-b, Ross-128b, TRAPPIST-1e, and LHS-1140b. The researchers found that the radiation on Proxima-b is similar to the amount the Earth had in its past.
Four billion years ago, the Earth was filled with radiation due to the sun being younger than it is now. All the exoplanets examined had less radiation that the Earth had during that time period.
Life on Earth existed during that time so that it may be possible alien life exists on Proxima-b.
Written by Barbara Sobel
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