History of Discovery

Edit

Super Earth-like Planet 2005

Discovered in 2005 by a team headed by Eugenio Rivera Super Earth, it is named Gliese 876d because it orbits Gliese 876 (two Jupiter-like planets with a size similar to Jupiter have previously been discovered in its 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. Due to Gliese 876d's distance from the sun, its hot surface can reach up to 650 degrees Kelvin.

Super Earth-like Planet 2006

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

At first, scientists thought this was just an ordinary Earth-like planet, but after research, they found that this planet is surprisingly similar to the Earth, almost like a replica of the Earth. According to scientists' speculation, the overall structure of this planet is quite similar to that of the Earth. Its "inner" has a rocky core like the Earth's, and its outer layer is wrapped in rocks and other components. However, its surface temperature is slightly lower, and there is no liquid water on it, only frozen ice. Therefore this planet is also called "Super Earth".

Super Earth-like Planet 2007

In April 2007, a team based in Switzerland led by Stephane Udry announced the boundaries of the habitable area around Gliese 581 Two new super-Earths have been discovered that may have liquid water on their surfaces. Gliese 581c, which is five times the mass of the Earth and is 0.073 AU or 11 million kilometers away from Gliese 581g

Gliese 581g

, is located in the habitable area. The average temperature of the "warm zone" (not taking into account the influence from the atmosphere) is estimated to be between -3 degrees Celsius, with an albedo comparable to that of Venus, to 40 degrees Celsius, with an albedo comparable to that of the Earth.

Super Earth-like Planets 2008

Scientists from the Geneva Observatory in Switzerland announced at an academic conference in France on June 16, 2008 that they had discovered five new "super planets" Earth". Among the five "super-Earths" discovered this time, three are located in the direction of Pictor and Dorado Australis, 42 light-years away from the Earth, with masses 4.2 times, 6.7 times and 9.4 times that of the Earth respectively. These three "super Earths" orbit a star slightly smaller than the sun, with orbital periods of 4 days, 10 days and 20 days respectively. The fourth "Super Earth" orbits the star HD181433 with a period of 9.5 days. The star HD181433 also attracts a Jupiter-like planet with a three-year orbit. The fifth "Super Earth" has a mass 22 times that of the Earth and orbits once every 4 days.

Since the discovery of the first "super Earth" in 1995, astronomers have successively detected more than 270 more. Most of them are as huge as Jupiter and Saturn, and there are fewer planets similar to the size of the earth. Because most "super Earths" are too far away from us, astronomers cannot directly observe them with the naked eye through ordinary astronomical telescopes. Instead, they can only rely on detection methods such as radio waves or spectral analysis to "indirectly measure" the existence of "super Earths".

Super Earth-like Planet 2009

Kepler 19b

On December 16, 2009, according to US media reports, a team composed of American and Australian scientists After studying the observation data of the "Keck" telescope and the Anglo-Australian Radio Telescope, an international research team discovered that there are four Earth-like planets in two nearby sun-like star systems, two of which are called "super Earths". Researchers believe that this discovery will provide important clues for mankind to find habitable planets, and mankind's hope of discovering habitable planets in the next few years will be greatly increased.

Among the four Earth-like planets, two are called "super-Earths". They are more massive than the Earth but less massive than Uranus and Neptune. The existence of these "super-Earths" suggests that it is only a matter of time before a habitable planet similar to Earth is discovered.

Of the four newly discovered Earth-like planets, three are located around the star "61 Virginis". The star "61 Virginis" is actually equivalent to the sun's twin brother. It is 28 light-years away from the Earth and is located in the constellation Virgo. At this time of year, Virgo can be observed in the night sky in the hours before the sun rises. Researchers separately estimated the possible minimum masses of these three planets. Chris Tinney, a member of the research team and astronomer at the University of New South Wales in Australia, believes that the minimum mass of "61 Vir b" is about 5.1 times the mass of the Earth, the mass of "61 Vir c" is about 18 times the mass of the Earth, and the mass of "61 Vir c" is about 18 times the mass of the Earth. 61 Vir d” has a mass approximately 23 times that of Earth. Tinney believes that "the mass of the smallest planet is just within the mass range of a super-Earth. This is the first time a planet of this size has been found around a sun-like star."

"Previously, scientists have also

discovered "super Earths"

"Super Earths" have been discovered around other stars, but those stars are much cooler than the sun.

December 22, 2009

Astronomers believe that this planet is closer to the Earth than any exoplanet discovered outside the solar system.

China Review News, Beijing, December 2009. On the 17th, Sina Technology quoted the British "Daily Mail" report that astronomers have discovered an Earth-like planet orbiting a dim star, only 40 light-years away from the earth. It is a steaming "water world" with a volume of 6 times that of Earth. It is believed that 75% of the surface area of ??this planet is covered by water, but because the temperature is too high, it cannot support the existence of Earth-type life. Astronomers believe that this "water world" also has an atmosphere. The planet is closer to Earth than any exoplanet previously discovered outside the solar system

By measuring the decrease in brightness caused by the planet's passage, scientists can calculate a planet's density and characterize its composition. An educated guess. Named "GJ1214b", three-quarters of the surface is believed to be covered by water and ice, leaving only about a quarter of rock.

Harvard. -Chakri Berta, a graduate student and astronomer at the Smithsonian Center who discovered the water planet, said: "Despite the high temperature, it is still a water world. This planet is smaller, cooler and closer to Earth than any other known exoplanet. ”

Scientists believe that in addition to the surface of GJ1214b, something must block the light from the parent star. It may be surrounded by an atmosphere composed of hydrogen and helium. With the help of the Hubble Space Telescope, astronomers may Determining the composition of the planet. David Charbonneau, director of the MEarth Project, said: "Because this planet is so close to Earth, Hubble should be able to detect the atmosphere and determine its composition. With luck, it will be the first super-Earth with a proven atmosphere, albeit one that may not be hospitable to life as we know it. "

The discovery was reported in the magazine "Nature" published on the 16th. In an article published in "Nature", the famous planet hunter and Professor Jeffrey Massey of the University of California, USA, said He speculated on what this water world might look like: "It may have extremely deep oceans, which should be liquid. Due to the heat given by the parent star, its surface temperature reaches about 190 degrees Celsius. Additionally, a sauna-like steam atmosphere may exist. "

Super Earth-like planet 2010

Gliese667c

Extrasolar planet. Its working principle is the "occultation observation method" - when one or more When a planet passes in front of its parent star, the star's light is partially blocked, and its brightness will decrease slightly. Through the unprecedentedly precise photometry of the Kepler telescope, it can detect this change in brightness and infer the occultation object. That is, the existence of planets. After analyzing data from the Kepler telescope over the past seven months, a team of scientists from the Harvard-Smithsonian Center for Astrophysics discovered two planets orbiting a planet named "Kepler-9". The planetary target of the star is about 2,300 light years away from the earth.

One of the planets, numbered Kepler-9b, has an orbital period of only 19 days. The other one, Kepler-9C, takes 39 days to orbit once.

Researchers found that the orbits of the two planets change periodically. Using this data, the researchers were able to calculate the masses of the two planets. The planets are both slightly heavier gas giants than Saturn.

But when researchers tried to use the size of the two planets to explain the brightness loss occurring in the central parent star, they were surprised to find another faint one. The detected weak signal shows that there is a smaller planet orbiting closer to the parent star. Its orbital period is about 1.5 days. And it's an Earth-like planet made of rock.

But researchers can't celebrate just yet, because there are many interfering factors in such a weak signal that can produce similar signal effects from background stars or companion stars in binary systems. "So far, all we can say is that we've found a very interesting signal, and we're very hopeful that we'll have more data soon," said Matt Holman, who led the study. Chief Scientist. But even if this signal is finally confirmed to be an Earth-like planet, humans are unlikely to want to colonize there: based on its orbital position, the surface temperature of the planet is approximately 1900 degrees Celsius [3] 2010 On September 29, 2019, astronomers from the National Science Foundation announced on September 29 that they had discovered a planet that is most similar to the Earth so far. Some of its regions have an environment and temperature suitable for human habitation.

This planet named Gliese 581g is located in the Libra constellation and orbits the red star Gliese 581, which is much smaller than the sun. The star is 20 light-years away from Earth, and astronomers have found six planets orbiting Gliese 581. The other five (Gliese 581b to Gliese 581f) are not located in the "Goldilocks zone" (habitable zone). However, this one is just in the habitable zone. Its temperature is not too hot or too cold, so that liquid water can Forming oceans, lakes and rivers.

Gliese 581g is likely to be a rocky planet with perhaps water and an atmosphere on its surface. Its diameter is about 1.2 to 1.4 times that of the Earth, its mass is about 3.1 to 4.3 times that of the Earth, and its gravity is similar to that of the Earth. , its average surface temperature is between minus 31 degrees and minus 12 degrees. The temperature of the red dwarf star it orbits is only 1/50 that of the sun, and its volume is 1/3 that of the sun. It only takes 37 days for Gliese 581g to orbit its "sun", and one side of it is always facing the "sunlight" and the other side is always in darkness. Therefore, the side facing the sun may be very hot, with a temperature of more than 100 degrees, while the temperature of the backlit side may be tens of degrees below zero.

The most suitable location for life or future human migration is the "grey" zone - the transition zone between darkness and light in Gliese 581g. Depending on its longitude, many forms of life can find stable climates suitable for their emergence and evolution.

Astronomers have found nearly 500 planets outside our solar system, however, almost all of them are too large, made of gas rather than rock, and not too hot for life as we know it. Just too cold. "This is the first planet that I'm really excited about," said Justin, an astronomer at Pennsylvania State University who thinks the planet is perfect for harboring life.

The discovery of life on other planets does not mean the discovery of aliens, but even the discovery of a single-cell bacterium on an alien planet will shake the view of the uniqueness of life on earth. However, we still have many unanswered questions about this planet. Scientists have not been able to confirm whether there is water on it or what the composition of its atmosphere is, but because its environment is perfect for the existence of liquid water, and there seems to be life wherever there is water on Earth, so Justin believes that "the probability of life on this planet is 100%."

Relatively speaking, the discovery of this planet did not take long and was not difficult. Astronomers believe that there are millions of such Earth-like planets waiting for us to explore. The discovery of Gliese 581g is based on 11 years of observations at the W. M. Keck Observatory in Hawaii. The combination of modern advanced science and technology with traditional ground telescopes continues to play an important role in exoplanet exploration.

Super Earth-like Planets 2011

In early May 2011, the International Astronomical Society composed of MIT, Columbia University, Harvard, and the University of California, Santa Cruz

The "Super Earth" described by the artist

The team of writers officially announced the discovery: Pandora.

The planet is numbered: 55 Cancri e, orbiting the star numbered 55 Cancri A, and it only takes 18 hours to make one revolution. In other words, you don’t need a calendar at all to live on this planet, just remember to bring a watch. And the sun you see is 60 times larger and 3,600 times brighter than what you see on Earth. The planet's surface temperature is 2,700 degrees Celsius. MIT astronomers believe that it is impossible for an atmospheric structure to exist at such a high temperature, but some scientists believe that strong enough gravity can retain part of the atmosphere. Due to the high brightness of the host star, many more sensitive measurements can be made. For scientists, the planet is a perfect laboratory to fully study planet formation, evolution and the entire life cycle.

However, this planet cannot be directly observed, even with powerful telescopes. The star in this planetary system, 55 Cancri A, will be visible to the naked eye on a clear night over the next two months.

A planetary system composed of the star 55 Cancri A. The first planet was discovered in 1997 by a research team in California and named 55 Cancri b. Within the next five years, the team discovered two more planets, 55 Cancri c and 55 Cancri d. In 2004, the Texas research team discovered 55 Cancri e. The third planet discovered in 2008 was also The fifth planet in this planetary system: -55 Cancri f.

The discovery process of these five planets is based on Doppler technology. Stars will wobble due to the gravitational effect of nearby planets, and the parameters of the planets are determined by measuring changes in the wavelength of starlight.

Rebekah, a doctoral candidate in astronomy at Harvard, and Daniel, an exoplanet expert at the University of California, Santa Cruz, reanalyzed the 2004 data and believed that the orbital period of 55 Cancri e was smaller than originally thought. Later, Winn of the Massachusetts Institute of Technology Astronomers and Matt Holman of the Smithsonian Center for Astrophysics applied to use the MOST space telescope for observation and found that the transit phenomenon occurs only every 17 hours and 41 minutes, which is consistent with the former's analysis, and the star's light only dims by 1 during each transit. /5000, these data also concluded that the diameter of this planet is approximately 210,000 kilometers, which is about 60% larger than the Earth.

This discovery makes Professor Matthews, an astronomer at Columbia University, very excited: Just like what Captain Kirk did in "Star Trek", we (science) will eventually catch up with science fiction. Kepler-22b is the first exoplanet in the habitable zone confirmed by NASA in December 2011. It orbits a star very similar to the Sun. NASA confirms Kepler-22b planet is habitable for humans. [5]

Super Earth-like Planet 2012

On February 2, 2012, an international team of researchers announced the discovery of a "super Earth" outside the solar system that may be suitable for life. Survive.

Astronomers discovered this "super Earth" while studying a dwarf star numbered GJ667C 22 light-years away

The "super Earth" GJ 1214b orbits a red dwarf star< /p>

Ball". It has a mass at least 4.5 times that of the Earth and orbits the dwarf star with a period of 28.15 days. The dwarf star GJ667C itself is a member of a three-star system with three planets. Except for this "super Earth" numbered GJ667Cc, the other two planets are not suitable for known life.

The researchers said in a paper to be published in the new issue of "The Astrophysical Journal Letters" that judging from the distance between the "super Earth" and the dwarf star, the surface temperature of the "super Earth" should be about the same as The Earth is close and liquid water may exist. However, this judgment needs more observations to confirm. "This planet is the 'best new candidate' to support liquid water and possibly life," said study leader Guillaume Anglada-Escude of the Carnegie Institution for Science. On February 20, 2012, astronomers confirmed the existence of a new planet in the universe, GJ 1214b. Also known as a "super-Earth," the exoplanet's atmosphere may contain abundant water vapor or be shrouded in thick fog. Therefore, astronomers believe that different materials may exist there.

American astronomers used the "Harper" telescope to observe this Earth-like planet, which is only 40 light-years away from the Earth and orbits a dim red dwarf star. GJ 1214b's diameter is about 2.7 times that of Earth, and its mass is 7 times that of Earth. The temperature of the planet is very high, perhaps 230 degrees Celsius, so different materials may exist there.

This is the first "super-Earth" exoplanet with an atmosphere discovered by humans, and the others are gas giants. It is also estimated that 75% of the planet's surface area is covered in water vapor, so staying on it will most likely feel like "steaming in a sauna." But this is the coldest planet ever discovered by humans making such observations.

Berta, a principal researcher at the Harvard-Smithsonian Center for Astrophysics, said: "GJ 1214b is different from all the planets we know." [6]

11, 2012 In May, astronomers searching for worlds that might be habitable to life have a new candidate: a world in a nearby galaxy that is seven times the size of Earth.

This planet is located in the constellation Pictor, about 42 light-years away from Earth. It was previously thought that the Pictorian star HD 40307 had only three planets orbiting it, but highly sensitive data filtering methods have calculated that there are three additional planets in the star system. The most distant planet is in a "sweet spot" - just the right distance from the star for liquid water, and therefore potentially life, to exist. [7]

Super Earth-like planets in 2014

According to the British "Mirror" report on March 27, astronomer Scott Shepard of the Carnegie Institution for Science in the United States Scott Sheppard discovered a pink planet at the edge of the solar system and named it after the Vice President of the United States (VP). This is a dwarf star named 2012 VP 113. It has a diameter of 450 kilometers and is located on the edge of the solar system further outside Pluto, where scientists once thought there were no planets. This planet of pink ice and rock orbits the sun.

The planet is the second object discovered in the mysterious region between the solar system and outer space known as the Inner Oort Cloud. Astronomers believe that there may be thousands of previously unknown objects orbiting the sun at its extreme distances. Scientists believe that the way the new planet orbits the sun indicates the possibility of a "super-Earth", which may orbit the sun at a great distance.

Follow-up reports will be continuously updated.

Super Earth-like Planet 2015

On March 7, 2015, British scholars confirmed the existence of "Super Earth" and it was the first habitable planet outside our solar system. [8]

A team of scientists reported in the weekly "Astronomy and Astrophysics" that this planetary system composed of four planets had been hidden in the M-shaped constellation Cassiopeia in the northern hemisphere. Earth is "only" 21 light years across. [9]

On July 23, 2015, Kepler 452b (Kepler 452b) is a newly discovered exoplanet by the National Aeronautics and Space Administration (NASA). Its diameter is 1.6 times that of the Earth and similar to the Earth. The index (ESI) is 0.83 and it is located in the constellation Cygnus, 1,400 light-years away from Earth.

This is the first "habitable" planet discovered so far in 2015 that revolves around the same type of star as the sun and is similar in size to the Earth. It may have an atmosphere and flowing water. It is called Earth 2.0. "Earth's cousin". [10]

Research Prospects

The "super Earth" that has been discovered is just the tip of the iceberg. With the advancement of modern observation methods and a new generation of technological innovation, the discovery of "super Earth" "The speed will become faster and faster. NASA's Kepler spacecraft carries humanity's largest telescope. The Kepler spacecraft has also been sent into outer orbit. It may find habitable Earth-like planets for the first time. In the future, humans will be able to find planets that orbit stars like the sun and are suitable for human habitation. Once such a planet is discovered, the interstellar immigrants that often appear in science fiction novels may become a reality.

Super Earth-like Planet 2016

Currently, astronomers have discovered a rocky spherical planet with a mass four times that of the Earth. It is the closest potentially habitable planet discovered so far outside the solar system. , only 14 light-years away from Earth.

This "super-Earth" planet is named Wolf 1061c and was discovered by Australian astronomers. There are also two planets orbiting a red dwarf star called Wolf 1061. The leader of the research report, Dr. Duncan Wright of the University of New South Wales, said: "This is a very exciting discovery! The three low-mass planets may be rocky planets with solid surfaces."

Wolf 1061c is located in the middle of the planet's orbit. It is in the habitable zone of the star, where liquid water and even life may exist. This discovery is of great significance. The red dwarf star Wolf 1061 is very close to us and contains a habitable planet. Although astronomers have discovered some planets in star systems closer than Wolf 1061, these planets are not suitable for life.

The three newly discovered planets (orbital positions from inside to outside) orbit the red dwarf star Wolf 1061, with orbital periods of 5, 18 and 67 days respectively. Wolf 1061 is a relatively large planet. Small, relatively cool, stable stars with masses 1.4, 4.3 and 5.2 times that of Earth respectively.

Wolf 1061c is located on the edge of the habitable zone, but it is likely to be a rocky planet. In contrast, another small planet closer to the main star is too close to the star to adapt. Life survives. Co-author Dr. Rob Wittenmyer emphasized that the three planets orbit the host star at close range, which means that they are likely to cross the "star face". If so, future research on their atmospheres will be Helps gain insight into whether it is conducive to the survival of life.

Super Earth-like planet in winter 2016

The discovery of super Earth attracted attention! It is reported that this earth's "big cousin" is orbiting a red dwarf star, named GJ 536 b. The big cousin has a mass 5.4 times that of the Earth and is only 32.7 light-years away from the Earth! Jonah Isa-Gonzalez pointed out that GJ 536 b orbits a smaller and cooler host star, but it is very close to the host star and is very bright.

November 22 news, according to the British Daily Mail, scientists recently discovered another "super Earth", only 32.7 light-years away from the earth. This earth's "big cousin" is surrounding A red dwarf orbits, named GJ 536 b. Once an Earth-like planet is discovered, the question of whether life exists will definitely return. Is there life on this super Earth?

Super Earth-like Planets 2017

Xinhua News Agency, Beijing, February 16, New Media Special Report, US media reported that an international team of astronomers discovered 60 star systems orbiting the nearby solar system of new planets, including a rocky "super-Earth".

The US Fox News website reported on February 14 that experts also found evidence of the existence of 54 more planets, bringing the number of potential "new worlds" discovered to 114.

One of the planets called "Gliese 411b" has attracted great attention. Gliese 411b, described as a "hot super-Earth with a rocky surface," is located in the fourth-closest star system to the sun, making it the closest star system to the sun, according to the University of Hertfordshire in the United Kingdom, which participated in the study. The third closest planetary system.

Gliese 411b orbits the star Gliese 411.

Miko Tuomi of the University's Center for Astrophysics said in an interview with this website that despite its name as a "super Earth", Gliese 411b is too hot for life to exist on its surface Survive.

Gliese 411 and Gliese 411b are located 8 light-years from Earth.

In comparison, Proxima Centauri b, a recently discovered Earth-like planet orbiting the red dwarf star Proxima Centauri, is about 4 light-years away from Earth. Red dwarfs are cooler, smaller stars.

The British "Nature" magazine and the American Space Network jointly announced on April 19th that a rocky planet with a moderate temperature transited a small star. The distance of this newly discovered "super-Earth" from its host star, its rocky composition, and the possibility of liquid water make it currently the best choice for the search for alien life.

Thousands of exoplanets have been discovered over the past 20 years, but the vast majority do not qualify as super-Earths: either too hot or too cold, or unable to possess Earth-like of natural environment. The latest research shows that the TRAPPIST-1 system, which was previously "very popular" and is believed to have seven Earth-like planets, may be subject to frequent and intense radiation, making it difficult for primitive life to establish a foothold, and one of them is not the same as the Earth. Rocky planet.

This time, astronomer Jason Dittman of the Harvard-Smithsonian Center for Astrophysics in the United States and his colleagues reported that they observed a star called LHS 1140 through the "MEarth-South" telescope array. of M-type dwarf stars. This is a common star type in the Milky Way. The star is about 39 light-years away from the sun and has a mass of less than 60% of the sun. The team further discovered that a transit occurred when the planet LHS 1140b passed by LHS 1140, and its circular orbit may have existed when it was formed.

They then used 144 radial velocity measurements to accurately give the planet’s radius (1.4 times that of Earth), mass (6.6 times that of Earth) and density, determining its Made of rock. Moreover, the planet's "sunshine" is mild, it receives low radiation from the host star, and it is located in the "habitable zone" of the host star - a range in which water can exist in liquid form on the surface of the planet. Scientists believe that liquid water is an essential element for the survival of life.

Dittman said that this star is the most exciting exoplanet he has seen in the past 10 years. The next step is to collect its atmospheric data with the Hubble Telescope.

News related to super terrestrial planets

Editor

Super terrestrial planets super earth

European Space Agency’s Herschel Space Telescope It is not uncommon to find a cluster of huge small celestial bodies (comets, etc.) in the periphery of another star system. Earlier in 2013, the telescope also observed the famous Fomalhaut star system. Using infrared observations that can see through the thick outer dust disk, astronomers can estimate how many comets in the star system were destroyed as they entered inner orbits. Scientists also assumed that planets in orbit in the star system collide with comets. Through these models, they concluded that there are 260 billion to 83 trillion small comets in the thick disk-shaped material belt outside Fomalhaut, while the outer solar system The number of comets in the Oort Cloud is thought to be similar. This observation also speculates on the evolution of oceans on planets, expanding the habitability of Earth-like planets and potentially habitable exoplanets.

In star systems that lack massive gaseous planets (such as Saturn and Jupiter), planets in inner orbits can avoid bombardment by massive comets. Conversely, smaller Neptune-like objects can make inner orbits Orbiting planets maintain a steady stream of small meteor showers. Because of this, the star systems of Gliese 581 and 61 Virgo are being "besieged" for a long time by a large number of small comets in the outer disk-shaped material group. Considering that the Gliese 581 star system has an evolution history of nearly 2 billion years, the inner orbiting planets may contain considerable reserves of "water resources."

The super Earth-like planet Kepler

is of the right size and location.” The Associated Press published an article on the 19th stating that the Kepler-62 planetary system is about 1,200 light-years away from the Earth. Located in the constellation Lyra. In this system, five planets orbit a star that is smaller, cooler, and older than the sun. Kepler-62e and Kepler-62f are the two outermost ones. They are 1.6 times and 1.4 times that of the Earth respectively, and the heat radiation received is only 1.2 times and 0.4 times that of the Earth. The orbital periods are 122 days and 267 days respectively, scientists from the Max Planck Institute for Astronomy in Germany said that Kepler- The temperature of 62e "could be like Washington in May." The researchers speculate that the two planets are mainly composed of rock or ice. Only after obtaining the relevant atmospheric spectral properties will it be clear whether they are truly "habitable". There is life on it, it must be very advanced." Another "New Earth" Kepler-69c is located in the Kepler-69 planetary system, in the constellation Cygnus, about 2,700 light-years away from the Earth, with a volume 1.7 times that of the Earth, and a revolution period It lasts 242 days, and its composition material is still uncertain. In addition, the orbital period of the other four planets in these two planetary systems is only more than ten days, which means that they are very hot and unsuitable for human survival.

Super Earth-like planets near the solar system

The European Southern Observatory announced on June 26, 2013 that German scientists' latest research found that there are three "super planets" suitable for the reproduction of life near the solar system. "Earth", there may be extraterrestrial life. The three planets orbit a star in the constellation Scorpius, just 22 light-years away from Earth. In terms of astronomical units, it can be said to be a neighbor to the earth. [13]

An international research team led by the University of G?ttingen in Germany discovered three "super-Earths" in the "habitable zone" around a star code-named "Gliese 667C". The star is located 22 light-years away in the constellation Scorpius. They had previously discovered that this star, which is about one-third the mass of the sun, has three planets, one of which is in the "habitable zone" where liquid water may exist. The latest research shows that this star has at least 6 planets, all of which are recognized as "super-Earths", that is, planets with an environment similar to that of the Earth and a mass that is usually 2 to 10 times that of the Earth. What is exciting is that three of these six planets are located in the "habitable zone" of the star system.

With the current situation of frequent natural disasters, many researchers are searching for a planet suitable for human habitation that is similar to the Earth's living environment. However, NASA recently announced that the United States announced the discovery of three "new Earths", and the issue of "habitability" was strongly questioned by Germany. NASA publicly stated that the Kepler telescope has observed two planets that are "the most Earth-like and possibly the most habitable for humans" in the solar system so far. One is as warm as Hawaii, and the other is as cold as Alaska, 1,200 light years away from the earth." At the same time, another NASA research team also announced that another "habitable planet" had been discovered farther away. The discovery of these planets also made many people believe that "humanity is one step closer to finding a similar home." After the news was exposed, the British media immediately issued a news report calling for the discovery of "Earth 2" and "Earth 3", but there are also some. Many media have expressed doubts. Even if a planet thousands of light years away from the earth is habitable, it is impossible for humans to truly colonize it, but it is none of our business.