The researchers at NASA have been searching for the existence of life outside the Solar system for many years. Recently, new research has revealed that planets around a dwarf star Trappist-1 may have had oceans for billions of years, according to Engadget.

What does the new research say?

Scientists will put their efforts into studying the red dwarf planets to find planets that could sustain life. They study Atmospheric Conditions of the planets to check whether it is a habitable planet or not. The researchers prefer to study dwarf red stars because they are easier to be found than the Sun.

They said that they could notice the changes in the amount of light on the top of the dwarf star when a planet passes in front of it, which could help them to study the atmospheric composition of a planet on the basis of the light amount it absorbs.

Yuka Fujii, a researcher at NASA's Goddard Institute for Space Studies (GISS), said, "Using a model that more realistically simulates atmospheric conditions, we discovered a new process that controls the habitability of exoplanets," Phys.org wrote. The new research allows scientists to use a model that calculates the atmospheric conditions in three dimensions not like previous models which stimulated atmospheric conditions only in vertical direction.

How will scientists find Earth-like planets?

Scientists are curious about the dwarf stars and planets which show possible evidence for the sustaining of life. They noted that a planet with the extremely cold atmosphere would make life difficult, but if it has a hot atmosphere, water will go up into the atmosphere and separate into oxygen and hydrogen.

A planet with the latter occurrence will cause all the oceans on its surface to vanish, Engadget wrote.

According to the latest research, planets which are orbiting the Red Dwarf Star, always have one side facing the star. As a result, these planets suffer extreme cooling on one side and heating on the other, which leads to the formation of the atmosphere.

But, the atmosphere prevents the evaporation of water and maintains it in the liquid state.

Anthony Del Genio of GISS said that the new research will help to detect a number of water vapors in the atmosphere of exoplanets. He also said that the planet with enough water is in the moist greenhouse state. The new study allows the researchers to observe the changes in the amount of water vapor while changing the orbital distance and type of radiation produced by stars.
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