Scientists have discovered a few secrets of the most mysterious planet TRAPPIST-1 system
TRAPPIST-1h in the representation of the artist
Planetary TRAPPIST-1 system is now clearly can not complain about the lack of attention. Astronomers from around the world directs his gaze in her direction and try to find out more about it. At the moment, we know that the system has seven planets. The three planets are in the habitable zone of a star that can mean in theory that the planet may have water and even life. We also know that turn the system around the world ultracold dwarf, which is located to him very closely. This can be both good and bad news, depending on which way you look. But now scientists have found also some facts about the most distant planet of the system.
The results of a new study published May 22 in the journal Nature Astronomy, reveal some details about the orbit of the planet TRAPPIST-1h. Using data collected by the Space Telescope, "Kepler", the research team was able to ensure the predictability of speed 6 planets of this system. Gravitational forces each of these planets enable remain stable system.
"Let's take the last planet of the system. When it makes a turn orbital 2, the planet walking in front of it, makes three turns. Going to the penultimate performs during the same period has 4 turns, and according to the same pattern as the rest of the world do 6, 9, 15 and 24 rpm ", - says astronomer at the University of Toronto Scarborough Dan Tamayo.
"This is called" chain resonances. " And, perhaps, it is the longest chain of resonances, which we have met in planetary systems. "
Using this information, the scientists were able to find out the orbital period of the planet TRAPPIST-1h. A complete revolution around the planet makes the star for 19 Earth days. TRAPPIST-1h is approximately 9, 6 million kilometers from its star. Therefore, the scientists say, probably, it is outside the habitable zone. Thus, we can assume that it is not able to maintain the existence of life. This is also its temperature readings. According to the space agency NASA, the amount of energy that the planet receives from its star, similar to the level that gets the dwarf planet Ceres, located in the asteroid belt of the solar system.
"We have found that the radius TRAPPIST-planet 1 h is about 0, 725 R, a steady-state temperature at its surface is about 173 K (-100 degrees Celsius). It is the coldest in this system. We also measured the rotation period of the star. He is 3, 3 days. several thin flashes on its surface was noted. In general, the star behaves quite quietly to the dwarf class M, located in the middle of its life cycle. "