Beyond the observable universe, space is still expanding at a speed exceeding the speed of light. It can be said that the universe is vast, and it has become too big for human beings to imagine. But there is a question that always bothers scientists, and also bothers ordinary people like us, Are humans alone in the universe?
In order to search for possible signals from aliens, the United States has built the Arecibo radio telescope, and China has built the FAST Eye Radio Telescope. In order to observe distant stars and search for possible habitable places for aliens, we have launched the Hubble Space Telescope and the Webb Telescope.
But despite all the efforts made over the last hundred years, there is still no exact answer to this question, but all this effort is not for nothing.
Although scientists have not found aliens, they have found some habitable planets similar to the Earth. Considering that the earth's resources are close to exhaustion and the sun will gradually age, human beings will need to migrate to other planets one day, so it is of insignificant significance to find habitable planets other than the Earth 39bet-đua chó-game giải trí -đá gà-đá gà trực tuyến-đánh bài.
With the development of technology, observing outer space is no longer only for scientists, but also for civilian astronomy lovers to explore the possibilities by all means.
IRD subaru strategic plan started in 2007. It aims to use Japanese data produced by the subaru telescope to search some of the terrestrial planets. The astronomical society of Japan journal recently published a study of the subaru telescope in over a region of only 37 light-years from earth, found a super earth within the habitable zone.
The new planet, named Ross 508b, orbits a red dwarf star called Ross 5081 in the constellation Serratus. The star is a red dwarf of spectral type M4.5 in the sky. It is smaller than the Sun, with only 18 percent of its mass and about 21 percent of its radius.
Since being smaller than the sun means its surrounding planets need to be closer to it to be in the habitable zone with the right temperature, what about Ross 508b?
According to the data, Ross 508b is only 5 million kilometers away from its parent star. Even Mercury, the closest thing to the sun in our solar system, is 60 million kilometers away from the sun, which means that Ross 508b is just about right away from its parent star, and you don't have to worry about the planet being extremely cold because the parent star is so small.
Because of the planet's small orbit, Ross 508b makes one orbit in only 11 days, or 11 days in a year on this planet.
Ross 508 b, on the other hand, it is bigger than the earth, the quality of it is about four times that of earth, and the suitable distance, the parent star allows the super there are the presence of liquid water on the earth, in each of its orbital period, will pass in the habitable zone of stars, which makes it with the key elements to sustain life, when in the habitable zone area, It can also rely on its own gravity system to retain water.
Ross 508B is the first exoplanet discovered by the Subaru Telescope's systematic search. Finding habitable planets in a red dwarf system is very difficult. Planets don't emit their own light, and looking for them relies on variations in the brightness of their parent star.
Red dwarfs, on the other hand, mostly have surface temperatures below 4,000 degrees Celsius, which makes their visible light so faint that it was difficult for early scientists to search for them until the transit method became relatively simple.
The Subaru telescope is equipped with a high-precision infrared Doppler instrument that can detect tiny fluctuations in the speed of a star, up to the speed of a human walking. When there are planets around the star, the gravity of the planets will have a small effect on the star, causing it to slow down.
If a star's velocity changes periodically, it is likely to have a planet around it.
While 37 light years may still be out of reach for humans, by the time we develop the technology for interstellar travel, it will be close to home, with the caveat that Ross 508B's environment may be a little worse than Earth's.
The first reason is that Ross parent stars are a bit too close to the 508 b, it is likely to have been stellar tidal locking, which is always only one side facing the star, in this case, the southern slope of the planet would have been the star of the roasted by surface temperature is high, the liquid water could evaporate, on the other hand is because no stars shine, Forever in the cold, dark world.
Second, Ross 508 is a red dwarf star, and compared to the sun so yellow dwarf, Ross, 508 will be more unstable. In such stars surface, often solar storms, the outbreak of massive solar flares, when flares, the energy released by the stars is much higher than usual, making large amounts of radiation of neighboring planets, lead to the survival and development of life cannot be stable.
While the final planetary situation may not be satisfactory, the discovery of Ross 508B has even more important implications for scientists. It will be an important observation to verify the habitability of planets around red dwarfs, and to study the spectra of the planets' atmospheres and atoms in greater detail.