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Internal structure of Europa. The blue represents a subsurface ocean. Such subsurface oceans could possibly harbor life. [55] Europa may have a liquid ocean beneath its icy surface, which may be a habitable environment. This potential ocean was first noticed by the two Voyager spacecraft, and later backed by telescope studies from Earth.
A diagram depicting habitable zone boundaries across star type with September 2024 data, based on previous habitable zone diagrams. [1] Earth is plotted alongside 42 exoplanets with radii less than 2 times that of Earth or masses less than 5 times that of Earth, making them potentially rocky worlds in the habitable zone.
In 2012, scientists introduced a concept to define the habitable orbits of moons. [30] The concept is similar to the circumstellar habitable zone for planets orbiting a star, but for moons orbiting a planet. This inner border, which they call the circumplanetary habitable edge, delimits the region in which a moon can be habitable around its planet.
The aim of Europa Clipper is to explore Europa in order to investigate its habitability, and to aid in selecting sites for a future lander. The Europa Clipper would not orbit Europa, but instead orbit Jupiter and conduct 45 low-altitude flybys of Europa during its envisioned mission. The probe would carry an ice-penetrating radar, short-wave ...
The only ways in which potential life could avoid either an inferno or a deep freeze would be if the planet had an atmosphere thick enough to transfer the star's heat from the day side to the night side, or if there was a gas giant in the habitable zone, with a habitable moon, which would be locked to the planet instead of the star, allowing a ...
The oceans of Europa may be habitable, according to a new model developed by NASA. This moon — 3,100 km (1,900 miles) in diameter — is the fourth-largest moon orbiting Jupiter.
The James Webb Space Telescope investigated a giant planet, K2-18b, that could be an ocean world, according to NASA. The exoplanet lies 120 light-years away from Earth.
Similarly, Tau Ceti e was thought to be likely habitable, [82] but with improved models of the circumstellar habitable zone, as of 2022 PHL does not consider it potentially habitable. [ 1 ] [ failed verification ] Kepler-438b was also initially considered potentially habitable; however, it was later found to be a subject of powerful flares that ...