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Long-term liquid water also on non-Earthlike planets?
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Unique exoplanet photobombs CHEOPS study of nearby star system
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Scientists detect signatures of life remotely
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IMAGE: Weathering of silicate rocks is part of the so-called carbon cycle that maintains a temperate climate on Earth over long periods of time. view more
Credit: © Universität Bern / University of Bern, Illustration: Jenny Leibundgut
The conditions on Earth are ideal for life. Most places on our planet are neither too hot nor too cold and offer liquid water. These and other requirements for life, however, delicately depend on the right composition of the atmosphere. Too little or too much of certain gases - like carbon dioxide - and Earth could become a ball of ice or turn into a pressure cooker. When scientists look for potentially habitable planets, a key component is therefore their atmosphere.
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IMAGE: This artist s illustration represents the possible interior dynamics of the super-Earth exoplanet LHS 3844b. The planet s interior properties and the strong stellar irradiation might lead to a hemispheric tectonic regime.. view more
Credit: © Universität Bern / University of Bern, Illustration: Thibaut Roger
On Earth, plate tectonics is not only responsible for the rise of mountains and earthquakes. It is also an essential part of the cycle that brings material from the planet s interior to the surface and the atmosphere, and then transports it back beneath the Earth s crust. Tectonics thus has a vital influence on the conditions that ultimately make Earth habitable.