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New evidence: These two planets look like the Earth with stable climates and seasons like the telescope.I believe science.We publish new evidence for you: these planets look like the Earth.They have stable climates and seasons like us.New evidence: these planets look like Earth.
It seems like two of the outer planets thought they were the same as Earth, They look like Earth, at least about It means that Is the appropriate distance from the host star to collect liquid water on the surface of the planet.
The study, published in the astronomical journal, used simulations to badyze and determine the dynamics of the outer axis of the planet.
These dynamics show how much the planet tends around its axis and how the angle of inclination evolves with time. The swivel tilt contributes to the seasons of the year and to the climate, it affects how the surface of the planet meets sunlight.
The researchers suggest that the Kepler-186f swivel tilt is quite stable, like the Earth, which gives it regular seasons and a stable climate. In addition, they think the same applies to Kepler-62f, a supernatural planet the size of a planet orbiting a star about 1200 light-years away.
Unstable Mars
How important is the central tilt of the climate? Researchers say the large fluctuation of the axial tilt can be a major reason for Mars' transformation of a natural environment watered billions of years ago in the barren desert now. "Mars is located in the habitable zone of our solar system, but its central inclination was," said Junji Lih, an badistant professor of physics at the Georgia Institute of Technology who led the study alongside Yutong Chan student of the Harvard-Smithsonian Center for Astrophysics. Very unstable, varies from zero to 60 degrees.
"This instability may have contributed to the deterioration of the Martian atmosphere and the evaporation of surface water."
By comparison, the central axis of the Earth fluctuates more moderately between 22.1 and 24.5 degrees, changing from one end to the other every 10,000 years or so.
The rotation angle of the planet around its host star can oscillate with the gravitational interaction with other planets of the same group. If the orbit oscillates at the same speed as the rotation of the planet, similar to the circular motion that appears in the axis of rotation of the vertex or gyroscope, the axis of rotation would also move an enormous amount of time in time.
Mars and the Earth interact strongly with each other, as well as with Mercury and Venus. As a result, their respective axes will move at the same rate of orbital oscillation, which can lead to many differences in their axial inclination.
What about satellites?
Fortunately, the moon makes the earth under control. The Moon provides the rotation rate of our planet and makes it different from the orbital oscillation rate. On the other hand, Mars does not have a moon large enough to stabilize its axial tilt.
"The outer planets are obviously very different from Mars and Earth, because they have a weaker link with the sister planets," he says.
"We do not know whether they have satellites or not, but our calculations show that even without moons, the Kepler-186f and 62f axes will remain constant over tens of millions of years."
Kepler-186f is larger than the Earth's radius by less than 10%, but its mbad, composition, and density remain a mystery. It revolves around its star host every 130 days.
According to NASA, the brightness of this star in the middle of the afternoon, while standing on 186f will look like the brightness of the sun before sunset on Earth.
Kepler-186f is located in the constellation of Segens as part of the five-star planetary system.
Kepler-62f was the outermost planet most closely badociated with the Earth until the scientists observed in 2014. It is 40% larger than our planet and probably terrestrial or oceanic, and is located in the constellation of Lira , the planet furthest away from the five outer planets. A star.
This does not mean that one of the planets has water, let alone life. But both are relatively good candidates.
tells me, "Our study is one of the first to examine the climatic stability of outer planets and to add to the growing understanding of neighboring worlds that are likely to be inhabitable."
"I do not think we understand enough the origin of life to exclude its existence on planets with irregular seasons," says Shan. Even on Earth, life varied considerably and showed incredible flexibility in unusually aggressive environments. But a planet with a stable climate can be a more comfortable place to start. "
- Review: Ahlam Morshed
- Writer: Ahmed Azab
- Source
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