Hua Feng's second day in the archives. Only Yun Meng and Bai Feng have come twice, and the rest is the report and summary sent by Shen Qiu of the farmer's family as usual, the farmer's family is currently developing well, and more and more people in the same way are collaborating to resist the "Doomsday Catastrophe".

For the rest of the time, Hua Feng just looked at the file tirelessly......

The scientists of the research group at the time believed that it was likely a topographic structure with nickel/iron rock or silicon covering. Between the Earth's terrestrial structure and the massive ice structure of Uranus/Neptune. It has dense vapor clouds. The results were observed by the Keck Observatory at the summit of Mount Mona Kea in Hawaii.

The Keck Observatory is home to two of the world's largest 10-meter optical giant telescopes. Each one is 8 stories tall and weighs more than 350 tons. The success of this discovery is also due to the improvement of the Keck Observatory's technology, which has improved the accuracy of the spectrometer CCD detector from 3 m/s to 1 m/s, laying the foundation for the future discovery of planets with the same mass as Earth in the Milky Way.

Scientists have discovered a planet very similar to Earth outside the solar system. With planet number 155, it is the smallest planet outside the solar system. Its radius is 2 times that of the Earth, and its mass is 7.5 times that of the Earth. 3,000,000 km (0.021 AU) from the star. The planet has an orbital period of 1.94 days.

Its orbit is only one-tenth the size of the orbit of Mercury in the solar system. The newly discovered planet is located in a galaxy called Gliese 876. It orbits a star named Gliese 876.

On March 30, 2015, a report titled "The Middle Terrestrial Planet Tatooine May Be Universal" reported that an uninhabitable gas giant orbiting a binary star has been discovered, and many researchers believe that it is impossible to form a rocky planet there. Now, mathematical simulations show that solid terrestrial planets like Tatooine are likely to exist, and probably ubiquitous.

Ben Bromley, an astrophysicist at the University of Utah, and Scott Kenyon of the Smithsonian Institution's Astrophysical Observatory say that "Tatooine sunsets may eventually be common." ”

Astronomers have discovered many giant terrestrial planets outside our solar system, which they call superterrestrial planets. Scientists speculate that these planets have plate tectonics similar to Earth's. British scholars have confirmed the existence of a "super-Earth" as the first extra-habitable planet.

Their surface generally has canyons, craters, mountains, and volcanoes. Astronomers have discovered many huge terrestrial planets outside our solar system, which they call super terrestrial planets, and these behemoths have prompted scientists to speculate about their similarities with Earth. Scientists at Harvard University point out that these Earth-like planets will have plate tectonics.

In January 2019, researchers discovered that a super-Earth is 6 light-years away and 3 times the mass of Earth and could potentially contain life.

Theoretically, terrestrial planets can be divided into two categories according to the type of rock, one is dominated by silicon compounds, and the other is dominated by carbides, such as asteroids containing carbonaceous meteorites.

These two categories are called silicate planets and carbon planets (or "diamond stars"), respectively. The scientists believe that although there is no direct evidence that the planet's surface is made of rock, the determination of its mass excludes that it is a planet made of gas like Jupiter. The data suggests that it is likely to be a topographic structure with nickel/iron rock or silicon overlay. Between the Earth's terrestrial structure and the heated massive ice structure of Uranus/Neptune.

It has dense vapor clouds. The results were observed by the Keck Observatory at the summit of Mount Mona Kea in Hawaii. The Keck Observatory is home to two of the world's largest 10-meter optical giant telescopes. Each one is 8 stories tall and weighs more than 350 tons. The success of this discovery is also due to the improvement of the Keck Observatory's technology, which has improved the accuracy of the spectrometer CCD detector from 3 m/s to 1 m/s, laying the foundation for the future discovery of planets with the same mass as Earth in the Milky Way.

Is there a planet in the universe that is similar to the Earth? Is our Earth the only one in the universe? This is a very profound question. So far, no one has answered in the affirmative or in the negative.

Astronomers have discovered several planets in the Milky Way with rocky surfaces similar to Earth. They have a much larger mass than the Earth and also lack a sun-like planet that revolves around them, but instead revolve around a dead star. There has been a milestone in answering this question.

Scientists have discovered a planet very similar to Earth outside the solar system. With planet number 155, it is the smallest planet outside the solar system. Its radius is 2 times that of the Earth, and its mass is 7.5 times that of the Earth. 3,000,000 km (0.021 AU) from the star.

The planet has an orbital period of 1.94 days. Its orbit is only one-tenth the size of the orbit of Mercury in the solar system. The newly discovered planet is located in a galaxy called Gliese 876. It orbits a star named Gliese 876.

Plate tectonics (the movement of huge plates that make up the solid shell of the Earth) is the main cause of earthquakes, volcanoes, and other geological events. In fact, they have dominated the geological history of the planet. Earth is the only known planet with plate tectonics, and it has been suggested that this movement is a necessary condition for the evolution of life.

In a paper published in the journal Astrophysics, Harvard planetary scientist Diana Valencia and her colleagues predict that the presence of plate tectonics on superterrestrial planets (which are 1 to 10 times the size of Earth) will satisfy one of their life-sustaining needs.

Valencia is the author of the paper, she told PhysO

"Some superterrestrial planets may be located within the 'habitable zone' of their solar system, which means that the distance between them and their parent star is just right for liquid water and therefore for life," G.com said. Ultimately, only the thermal and chemical evolution of these planets will determine whether they are habitable or not. But these thermal and chemical properties are very closely related to plate tectonics. ”

"Our work strongly points to the fact that superterrestrial planets will exhibit plate tectonic behavior even in the absence of water," Valencia said. Later, they may be able to verify these conclusions using NASA's Earth Planet Probe program, or the European Space Agency's Darwin program, which consists of three telescopes to find terrestrial planets.

Using detailed models, they discovered the internal structure of a massive terrestrial planet, and Valencia and her team determined the mass of the superterrestrial planet in relation to the thickness of the plates, as well as the stress values experienced by the plates.

These pressures (part of the very slow convection of the Earth's mantle) are the main drivers that cause plate deformation and subduction (one plate sinks below another).

For planets that are much larger than Earth, this drive will be greater than Earth's. The team found that when the mass of a planet increases, its shear stresses increase and the plate thickness becomes thinner. These factors weaken the plates, causing plate subduction to occur. Plate subduction is a fundamental component of plate tectonics. Their findings suggest that these factors are even more essential for larger terrestrial planets.

Earth-like planets are planets with silicate stone as the main component. They are very different from Jupiteroids in that those gas planets are mainly composed of hydrogen, helium, and water, rather than necessarily solid surfaces. The terrestrial planets have much the same structure: a metallic center dominated by iron, and an outer layer surrounded by a silicate mantle. Their surface generally has canyons, craters, mountains, and volcanoes.

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A team discovered SuperEarth in 2005 and was named Gliese 876d because of its orbit around Gliese 876 (two Jupiter-like planets similar in size have previously been discovered in their galaxy). Its mass is estimated to be 7.5 times that of the Earth, and its orbital period is quite short, only about two days. Given the solar distance of Gliese 876d, its hot surface can reach up to 650 degrees Kelvin.

On March 14, 2006, a group of astronomers specializing in "star hunting" discovered a planet very similar to Earth in the depths of the Milky Way, which may be the key to finding a new home for life. Located 9,000 light-years from our solar system, the planet is about 13 times the size of Earth and about the same mass as Neptune. It orbits a red dwarf star, which is its "sun", half the size of the sun and much cooler than the sun.

At first, scientists thought it was just an ordinary terrestrial planet, but after research, it was found that this planet is strikingly similar to Earth, and it is almost like a replica of Earth. Scientists speculate that the planet's overall structure resembles that of Earth, with a rocky core like Earth on the inside, and an outer layer wrapped around rocks and other components. However, its surface temperature is slightly lower, and there is no liquid water on it, only frozen ice. For this reason, the planet is also known as the "super-Earth".

April 2007, by Stepha

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A team led by Y based in Switzerland has announced the discovery of two new super-Earths on the edge of the habitable area around Gliese 581, with the potential for liquid water on their surfaces. There is five times the mass of the earth, and the distance is grid

Liser 581 is 0.073 AU or 11 million kilometers of Gliese 581c, located in the "warm sheath" of the habitable zone, and its average temperature (excluding atmospheric influences) is estimated to be between -3 degrees Celsius with an albedo comparable to that of Venus and 40 degrees Celsius with an albedo comparable to that of Earth.