We know that the space has no end and there are mysteries in it that we are yet to unravel. However, one mystery is rather simple to solve and it is none other than the existence of life on exoplanets. In the past, several people had question regarding the occurrence of life on other planets in space. However, all such questions were answered when a recent study revealed that all known alien planets to humans cannot support life.
The scientists involved in the study were keen on studying the conditions required to sustain oxygen-based photosynthesis which is the driving force behind all life. Despite the fact that 1000s of planets have been found in our own galaxy, the planets that are earth-like and in the habitable zone are significantly less normal. Presently, we know only a few habitable exoplanets. The study published in Monthly Notices of the Royal Astronomical Society disclosed that one of the exoplanets that they studied, namely Kepler-442b, could receive stellar radiation that might support life. The exoplanet is actually a super-Earth and is revolving around its sun in the habitable zone of Kepler-442 which is located 1,206 light-years away from our own planet.
The research group found that to support life, any planet needs a biosphere similar to Earth and it can be built by oxygenic photosynthesis only. Photosynthesis is an activity by which plants transform light and carbon dioxide into oxygen and nutrients. By performing calculations of the photosynthetically active radiation (PAR) received by the exoplanets from their host stars, the group landed on the conclusion that most of the stars are not as hot as our own Sun to encourage the evolution of life on their planets. The study gave a final verdict stating that “none of the exoplanets could sustain a rich biosphere”.