To date, more than 4,000 exoplanets have been discovered and documented outside our solar system, including rocky planets similar in size and mass to Earth.
They have the same geological structure as Earth and tend to be slightly larger than Earth, so they are also known as super-Earths, which have become a candidate for future human migration, given that the Earth's resources will one day run out, the sun will age and the solar system will not be suitable for human life.
About 30 of those 4,000 super-Earths have been confirmed as Earth-like planets that have the basic conditions for life and may even have spawned it. The Japanese Astronomical Society recently published a major discovery: scientists have found another super-Earth and named it Ross 508b 39bet-xsmb-xổ số tây ninh-xổ số binh phước-xổ số binh dương-xổ số đồng nai.
It's worth noting that Ross 508b is only 36.5 light-years away from the solar system. This is great news for humanity, because while there are countless planets in the universe, there are very few Earth-like planets, and very few that come this close to Earth.
Ross 508b is located in the constellation Serpentine in the northern star
Data show that the quality of it is about four times that of earth, the female star it orbits around the called rose 508, Ross's 508 spectral type of M4.5, is a dim red dwarf stars, it is about one 5 of the sun, the radius of the quality of only about 18% of the sun, 75% are such low-mass stars in the galaxy, a star's brightness and temperature, and the quality is.
Ross 508's surface temperature is only about 2,800 ° C, 2,700 ° C cooler than the Sun, which means that the heat emitted by its parent star is limited, and Ross 508B needs to be much closer to its parent star to be in the habitable zone and warm enough to generate liquid water. If it's the same distance as the Earth is from the sun, Ross 508b is probably freezing.
Using the 8.2-meter Pleiades Telescope in Hawaii, astronomers estimate that Ross 508b is about 7.928 million kilometers away from its parent star. That's 21 times the distance between the Earth and the moon, and only about 1/19 of the distance between the Earth and the sun. If a planet was that close to the sun in the solar system, it would be burned by the star all day long. Surface temperatures can reach hundreds of degrees Celsius, making it impossible for liquid water, let alone life, to exist.
But as we mentioned above, Ross 508b's parent star is much smaller than our sun, which puts it right in the galaxy's habitable zone, in which case liquid water is likely to exist on the planet.
Although within the scope of the universe, Ross 508 b is close to the distance of the solar system, but the planet itself will not glow, we cannot be directly observed with the naked eye on the earth, and its main star Ross 508 itself is very dark, it's not easy to know about it in detail carefully, more complicated search for planets around them.
Finding exoplanets isn't just a matter of looking through a telescope. Planets can easily get lost in the light of their parent stars. So there are two main mainstream methods to find exoplanets, which are the transit method and the astrometry method.
When we observe a distant star from Earth, if the star shows periodic changes in light, it means that a planet may be getting between the Earth and the target star, thus affecting the star's brightness.
With the aid of modern astronomical devices, such as the Hubble telescope, and MOST of Canada, the brightness of the stars can be observed that the weak change, so as to judge whether stars have planets around, but this method has certain limitations, namely must be and the orbit of the planet earth in the same plane, it will not be able to block between earth and the target star.
Ross 508b was discovered using an astrometric method. When a planet orbits its parent star, the star exerts its gravitational influence on the planet, which in turn exerts its gravitational influence on the star, causing the star to wobble periodically in space by a small amount.
Exoplanets can also be inferred indirectly by this method, but only under the condition that the mass of the planet cannot be too low relative to the star, or the gravitational pull would be too small to be detected by Earth.
So although there are countless planets in the universe, it is very difficult to find planets suitable for human life. So is Ross 508B suitable for human life?
Is it possible that alien civilizations already exist?
Although Ross 508b is in the habitable zone, not all planets in that zone are hospitable. Take the solar system's Venus and Mars, both of which are also in the habitable zone, but neither of which has apparently given rise to life, and there is every indication that Ross 508b is likely to be a much harsher environment than Earth.
For one thing, it's so close to its parent star that it's probably tidally locked, with only one side facing the star at all times, burning. If there was liquid water on it, it would be near boiling, while on the other side there would be no light all year round, cold and dark, and the water would probably be in the form of ice.
Second, Ross 508B's host star is a red dwarf, and its flares are even more intense, causing Ross 508B to be exposed to various electromagnetic radiation. So scientists have concluded that Ross 508B is basically inhospitable to life, and therefore aliens are unlikely to exist.
In fact, even if it is a habitable planet, the distance is still an unbridgeable gap for human beings at present. So we need to develop science and technology if we want to reach the stars and oceans further.