Found 20.5 lightyears from Earth in the constellation of Libra, is a planetary system, Gliese 581. And in this system contains an Earth-like planet Gliese 581 d, or unofficially known as Zarmina. Gliese 581 contains a red dwarf star at the center, specifically spectral type M3V.
The exoplanet lies near the habitable zone of its parent star, which is the area around star where planets are close enough to have the right amount of heat and radiation from the star not too close to be deep-fried or too far to be frozen solid. In this zone there is a high chance for liquid water to be present and a strong possibility for life. This planet is believed to be the one of most Earth-like planets, and the one of the best exoplanet candidates with the potential for harboring life.
It’s possible that this planet has more of an atmosphere like Venus due to being tidally locked to it’s star, where one side of the planet faces the star at all times, where the other side faces away at all times. Known as the substellar point, this region continuously receives more direct sunlight, and thus more heat. Water on one side may be in a vapor form while on the other side it may be frozen into ice. With one side experiencing strong constant heating can change or even control how much weathering occurs on the planet, which can lead to significant and even unstable climate changes. These dramatic climate effects could make a planet that otherwise has the potential for life to instead be uninhabitable. This can create something known as a runaway greenhouse effect which is similar to what’s happening on Venus.
Plenty of other issues arise with a tidally-locked planet other than just the extreme temperatures. Permanently facing away from the star, the dark side would lack all the heat from the star. The atmosphere there would first turn into a denser gas, then condense into a liquid, and then possibly further condense into solid form. Although it is not likely that the atmosphere on the dark side of the planet would get to solid form, it would certainly keep condensing and leaving a vacuum to suck in the expanding hot air from the other side. Where the atmosphere on the heated side will continue to heat up and expand. So you have this constant condensing on one side of the planet and constant expanding on the other.
Lastly, this changing atmosphere can cause storms, BIG INTENSE STORMS. The atmosphere from the light and dark side of the planet essentially switched sides continually. And though this can cause massive storms, the presence of an atmosphere may actually help distribute the heat across the planet, equalizing the temperatures. But tidal locking could result in wide climate variations, a result that could threaten the evolution of life on the surface of these planets. But, until more data is collected, there’s no telling just yet for the possibility of finding life on exoplanet Gliese 581 d.