Scientists hope to discover life on planets that are tidally locked.

                                                Image by Daniel Roberts from Pixabay

When planets are tidally locked to their parent stars, one side remains exposed to light and the other stays dark, and this poses a challenge to astronomers searching for indications of life.

Given that such planetary bodies are ubiquitous across the universe, astronomers are optimistic that they can uncover such remnants at the border between light and dark.

Although scientists estimate that there may be millions of exoplanets beyond our solar system, NASA has only found about 5,000 exoplanets to date.

Because of limitations in existing technology, scientists can only investigate planets in close proximity to their parent stars, which means that Earth-like rocky planets can only be found close to red dwarf stars.

These planets are high on the search priority list.

In a Space article, Paul M. Sutter, an astrophysicist at SUNY Stony Brook and the Flatiron Institute in New York City, stated: "But there are less however, possible chances of finding life as one side facing light could cause radiation to hazardous levels while the other side is too cold to sustain life."

In order to support life, these planets' atmospheres must be able to transport heat and cold. It also depends on other elements including the makeup of the planet, how far it is from its star, and water."

Research revealed that potentially livable worlds might have oceans. With enough water, strong ocean currents, and a system for freezing and evaporating water, it can transport heat from the daytime to the nighttime with efficiency.

"It would be very strange to live in a world like this," Sutter wrote. Its star would remain fixed and low on the horizon for all eternity.

He expressed hope that they are promising candidates for "continuous study with the James Webb Space Telescope, and they just might be home to the first kind of alien life that we encounter," even though there isn't enough evidence to support it.

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