All the planets of the TRAPPIST-1 is very similar to Earth.
The seven planets that revolve around stars TRAPPIST-1, mostly rocky, with some potentially contain more liquid water than Earth.
To such conclusion the group of researchers from the University of Bern in Switzerland.
A new study indicates that the density of worlds in this planetary system more accurately than ever before. The obtained data show that on some planets may contain up to 5 percent of the mass in the form of liquid water, that is about 250 times more water than Earth’s oceans.
“All the planets TRAPPIST-1 is very similar to the Ground – they have a solid core, surrounded by an atmosphere. TRAPPIST-1e – the planet most similar to Earth in terms of mass, radius, and energy derived from the stars,” said Simon Grimm, a researcher of exoplanets at the University of Bern in Switzerland. Working with a group of researchers, Grimm accurately modeled density in the seven realms.
The researchers relied on data collected by the Space telescope named after A. S. Spitzer, and some instruments of the European southern Observatory in Chile to make detailed observations, which could reveal changes in the planetary orbits.
“The system of TRAPPIST-1 is special because all the planets are in a resonant condition,” said Grimm.
Grimm used the simulation, which he had previously used for computing planetary orbits. His team have modeled the mass and density of the worlds, mimicking the orbits of the planets, while their simulated movements did not coincide with the observed. The researchers found that the density of worlds in the range from 0.6 to 1.0 times the density of the Earth. Seven worlds rich in water, the water level in some reaches 5 percent of the total weight. For comparison, only about 0.02 percent of the mass of the Earth contained in the water.
The researchers warned that the new findings, published in the journal “Astronomy and astrophysics”, not directly talking about the possibility of life in the TRAPPIST system-1. However, helping researchers better understand the conditions associated with this system, a new study helps to achieve success in understanding whether such worlds are, in principle, support life.
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