description TRAPPIST-1e Overview
TRAPPIST-1e is an Earth-sized exoplanet circling the ultracool dwarf star TRAPPIST-1. Measurements of its size and mass support a rocky composition. Its orbit falls in the region commonly described as the habitable zone, where suitable atmospheric conditions could allow liquid surface water. Those characteristics make it a subject of interest without establishing that it resembles Earth in climate.
Scientists study the planet to investigate whether small worlds around very cool stars can retain environments compatible with habitability. Oceans remain a possibility to explore, rather than an observed feature, and surface conditions cannot be inferred from orbital location alone. The planet is relevant to research into rocky-world formation and the search for extraterrestrial environments. As one member of a compact system, it also allows comparisons with neighbouring planets exposed to different amounts of energy from the same star.
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Could TRAPPIST-1e support human life?
TRAPPIST-1e is considered one of the most promising candidates for habitability within the TRAPPIST-1 planetary system. It orbits comfortably within the star's habitable zone, where temperatures could theoretically allow for the existence of liquid water. Scientists are actively using instruments like the James Webb Space Telescope to study its atmosphere for potential biosignatures.
What type of star does the exoplanet TRAPPIST-1e orbit?
TRAPPIST-1e orbits an ultra-cool red dwarf star designated as TRAPPIST-1. This M-dwarf star is significantly smaller, cooler, and less massive than our own Sun. Because the star is so dim, the planet's year is very short, completing an orbit in just about six Earth days.
How far away is the TRAPPIST-1 system from Earth?
The TRAPPIST-1 system is located approximately 40 light-years away from Earth in the constellation of Aquarius. While that is relatively close in astronomical terms, it is still far too distant for current human spaceflight technology to reach. It was discovered by the TRAnsiting Planets and PlanetesImals Small Telescope (TRAPPIST) in Chile.
How large is TRAPPIST-1e compared to Earth?
TRAPPIST-1e is an Earth-sized exoplanet with a radius roughly 0.91 times that of Earth's. It is also slightly less massive than our planet, possessing about 69% of Earth's mass. These figures indicate it is likely a dense, rocky world with a solid, terrestrial surface.
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