That could mean they all contain about the same ratio of materials thought to compose most rocky planets, like iron, oxygen, magnesium, and silicon. They are likely made of similar stuff, but they are different than Earth. The study pinned down the density of each planet more precisely, making TRAPPIST-1 the most thoroughly known planetary system apart from our own.Ī 2021 study revealed more about TRAPPIST-1 planets. In February 2018, closer study of the seven planets suggested that some could harbor far more water than the oceans of Earth, in the form of atmospheric water vapor for the planets closest to their star, liquid water for others, and ice for those farthest away. There is the possibility that future study of this unique planetary system could reveal conditions suitable for life. This system of seven rocky worlds–all of them with the potential for water on their surface – is an exciting discovery in the search for life on other worlds.
In a press release on February 22, 2017, NASA announced the discovery of the most Earth-sized planets found in the habitable zone of a single star, called TRAPPIST-1. An analysis of TRAPPIST-1 b, the innermost planet, revealed its dayside temperature and found little evidence of an atmosphere. In March 2023, the first science from the Webb telescope was released. We've looked at the seven rocky exoplanets orbiting the TRAPPIST-1 star with ground and space telescopes like Spitzer, Kepler, Hubble, and, now, the James Webb Space Telescope. The most studied planetary system, aside from our own solar system, lies about 40 light-years away.
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