Planets Suitable for Alien Life

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Planets Suitable for Alien Life


As more and more planets beyond our solar system are being discovered, the list of exoplanets scientists believe can support alien life is also growing. The latest update added two new planets near the GJ 357 and GJ 1061 planetary systems, bringing the list to a total of 55 habitable exoplanets.

Check out seven of these potentially habitable exoplanets that are most similar to planet Earth according to the University of Puerto Rico’s Planetary Habitability Laboratory (PHL).



Photo Credit: NASA


Teegarden’s Star-b

Located 12 light-years from Earth, Teegarden’s Star b have minimum masses similar to Earth. Scientists found that the exoplanet orbits within Teegarden’s Star’s habitable zone and is the fourth nearest potentially habitable planet.

“Teegarden b is the planet with the highest Earth Similarity Index (ESI) discovered so far,” the PHL said, meaning it has the closest mass and insolation to terrestrial values.



Photo Credit: NASA


K2-72 e

K2-72 e is considered a super-Earth exoplanet orbiting a red dwarf (the smallest and coolest kind of star). It has a mass 2.21 that of our planet and can complete an orbit in 24.2 days, according to NASA. Found 217 light-years away, K2-72 e orbits within its star’s goldilocks zone but is six percent colder compared to Earth.



Photo Credit: NASA


GJ 3323-b

Like K2-72e, GJ 3323b also orbits a red dwarf and its mass is equivalent to 2.02 Earths. The super-Earth exoplanet is 17 light-years away and completes an orbit in just 5.4 days. GJ 3323b has been ranked as the third most Earth-like exoplanet.



Photo Credit: NASA



This terrestrial Earth-sized exoplanet can be found 40 light-years away. Illustrations by NASA artists show a narrow band of water on TRAPPIST-1 d, which coincides with the illustrations showing possible water or ice in the TRAPPIST-1 system.



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GJ 1061-c

GJ 1061-c is one of the two newly added exoplanets from the GJ 1061 system. It has an orbital period of 6.7 days and is equivalent to 1.75 Earths. GJ 1061-c was discovered along with two other exoplanets GJ 1061-b and GJ 1061-d.



Photo Credit: NASA



Placing sixth on the Earth Similarity Index, TRAPPIST-1 e has a planetary-mass of 0.62 Earths. The exoplanet is found in the constellation Aquarius and is about 40 light-years away. Much like the rest of the exoplanets on the top seven, TRAPPIST-1 e was found using the transit method in which the planet blocked a small percentage of its host star’s light when it passed between the star and Earth.



Photo Credit: NASA


GJ 667-cf

Found in 213, GJ 667-cf has a mass of 2.7 Earths and has a radius that’s 1.45 greater than the Blue Planet. It’s located 22 light-years away and takes 39 days to complete an orbit around its host star. GJ 667-cf s believed to hold liquid water thanks to its position within the GJ 667-C’s system.



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