Gliese 58 1 gliese 58 1c

European astronomers announced on April 24th, 2007, US Eastern Time that a planet that may be suitable for human habitation has been discovered for the first time outside the solar system, and there may be oceans and life on this planet. The mass of this planet is about five times that of the earth, and it is 20 light years away from the earth. It orbits a red dwarf star named "gliese 58 1", so it was named "gliese 58 1c".

Up to now, Gliese 58 1c is the smallest of about 200 extrasolar planets that have been discovered. In addition, its orbit is in the "habitable zone", and if other conditions are suitable, there may be surface water and life.

Gliese 58 1c was discovered by a team of European astronomers. At present, the team has written relevant papers and submitted them to the Journal of Astronomy and Astrophysics. However, Stephane Houdry, an astronomer at the Geneva Observatory and the main author of the paper, said that it is not yet possible to conclude that gliese 58 1c has liquid water. Sara Sara Seager, a planetary expert at the Massachusetts Institute of Technology, said: "If the atmosphere of gliese 58 1c is thicker than Venus, liquid water will be too hot to exist." Diameter: 1.5 times

Mass: 4.83 times that of the earth.

Average surface temperature: 290K K k.

Distance to Earth: 20 light years (or118 billion miles)

Travel time: it takes about 200 years for a rocket to travel at one tenth of the speed of light, that is, at the speed of 19000 miles per second.

It is one of six planets orbiting gliese 58 1 red dwarf.

Days in period of revolution: about 13 days on earth.

Gravity: approximately equal to or slightly higher than the earth.

Distance from the sun: about 6 million miles.

Gliese 58 1 Red Dwarf is about one third the size of our sun. It is 50 times colder than the sun.

Composition: Rock, liquid water and atmosphere. Gliese 58 1c orbits the main star Gliese 58 1 once every 13 days, and the orbit is about 7 million miles away from the main star. According to the planetary model drawn by Sa Syrov and his colleagues, Gliese 58 1c is about one and a half times the size of the earth, and is mainly composed of rocks and water. He said: "The most exciting thing is that the new discovery tells us that there are many such planets. After billions of years of geological movement, such a planet may be more suitable for life than the earth. NASA's upcoming Kepler program may find hundreds of similar planets. "

Although the distance between Gliese 58 1c and the main star is much smaller than the distance between the earth and the sun, the brightness of Gliese 58 1 is only 1% of that of the sun, so the distance of 7 million miles does not affect the living. Udry said that the temperature of Gliese 58 1c depends on its albedo. Taking the Earth and Venus as reference objects, he predicted that the surface temperature of gliese 58 1c would be between 0 and 40 degrees Celsius.

The European Southern Observatory released the simulation map of the newly discovered planet Gliese 58 1c orbiting the red dwarf Gliese 58 1 on April 24th, US Eastern Time. Astronomers believe that this planet may be suitable for human habitation.

20 light years away from the Earth, European astronomers discovered a planet very similar to the Earth. This planet, named Gliese 58 1C, has a gravity of 1.6 times that of the earth, a surface temperature of 0-40 degrees Celsius, and may contain liquid water. This is the first planet suitable for human habitation discovered by scientists outside the solar system, and this day literary discovery will go down in history. Hong Kong China Rating Society, September 30th/It is not a dream to emigrate to another planet. Astronomical scientists have discovered for the first time the first planet outside our solar system that can support life. Neither too hot nor too cold. And gravity like the earth. The probability of life survival is 100%, not to mention the possibility of alien life here!

Taiwan Province News reported today that American scientists reported on the 29th that they had discovered this "Earth-like planet so far" by using the Kejak telescope in Hawaii. It is a rocky planet, located in Libra, about 20 light years away from the earth.

It orbits the Libra red dwarf gliese 58 1. Six planets have been discovered in this galaxy so far, and astronomers named this newly discovered "super earth" Gliese 581g.

The Carnegie Institution and the University of California, Santa Cruz and other institutions tracked this red dwarf star for 1 1 year. They use spectrometers to detect planets by the so-called radial velocity method.

Gliese 58 1g planet is located in the blond region of the red dwarf gliese 58 1. The so-called "livable zone" refers to the area where the distance between the planet and the star is suitable. In this region, the heat transferred from the star to the planet is moderate, and the planet is neither too hot nor too cold. It can also make liquid water form ocean conditions.

The mass of Gliese 58 1g is about 4.3 times that of the earth, and the gravity is 1.6 times, which is enough to retain water. Like Mercury in the solar system, this exoplanet Gliese 58 1g is also "locked" by its star, which means that one side of this planet almost always faces the star, while the other side almost always faces the star, so the surface temperature difference is large. The researchers speculate that the average surface temperature of the planet is between -3 1 celsius and-12 celsius. The "Second Earth" 20 light years away.

The discovery of earth-like planets proves that the earth is not a lonely accidental individual in the universe-this may be one of the greatest wishes of all astronomers. Earth-like planet, which scientists define as "a planet similar in size to the earth, but the temperature allows liquid water to exist". Although many observed planets, including Mars, were on the candidate list of terrestrial planets, the final observation results were mostly disappointing, and it was not until the appearance of Gliese 58 1C that the enthusiasm of the astronomical community was rekindled.

According to the observation and analysis results, gliese 58 1C is the planet closest to the Earth's environment observed so far. Its diameter is 1.5 times that of the earth, its weight is 5 times that of the earth, its gravity is 1.6 times that of the earth, and its surface temperature is between 0 and 40 degrees Celsius. Rock structure, with atmosphere, and its composition to be determined; There is liquid water, and there may even be a liquid ocean ... In short, this planet is called the "second earth" outside the solar system.

Gliese 58 1c is named after its surrounding star Gliese 58 1. Gliese 58 1 is a red dwarf star, one of the nearest 100 stars, only 20 light years away from the earth. Compared with the sun, its surface temperature is only half that of the sun, and because Gliese 58 1C runs in an orbit closer to this star, its surface temperature reaches a balance similar to that of the earth, which is suitable for human habitation. Gliese 58 1C can complete one revolution every 13 days. Gliese 58 1c planet was finally discovered by the European Southern Observatory Space Telescope in La Silla, Chile. This space telescope has a special instrument that can detect the shaking of celestial bodies with different wavelengths by splitting light. And these vibrations can reveal the existence of celestial bodies. Chris McKay, an astrobiologist at NASA, said: "According to the observation results, although life does not necessarily exist on this planet, it is a planet similar to Earth in terms of potential livability."

Optimistic astronomers and astronomy enthusiasts even fantasize about a new life on Gliese 581C. On Gliese 58 1c, people can have a birthday every 13 days, so they have to face the problem of soaring age at the same time. Weight will look more than twice as heavy as on earth, so losing weight will become a more serious problem; We can see a red sun nine times larger than the earth, but because there is no rotation, the new earth Gliese 58 1c is always half day and half night ... These concerns seem to be within the scope of consideration, but the problem is that the "relatively close" 20 light-years mentioned by astronomers is about 190 in terms of the scale we are familiar with and the current means of transportation of human beings. "We don't know how to get there in our lifetime," said Steve Malan, a retired astronomer from NASA and a spokesman for the American Astronomical Society.

Can't arrive, but it can still go down in history.

Although gliese 58 1c can't be conceived as a human colony or resort in the near future, it doesn't affect that it will go down in history. Michel Meyer, an astronomer at the University of Geneva in Switzerland, said, "This is an important step towards finding life in the universe." Allen Bos, a scientist at the Carnegie Institution in Washington, USA, also called this discovery "an important milestone in the field of astronomy".

Europe and the United States each have a research team dedicated to discovering terrestrial planets, but before that, the telescope of the Observatory spent 90% of its time looking for stars like the sun, and stars with low energy and small size like red dwarfs were not considered as "hosts" of planets that might be suitable for life. The discovery of Gliese 58 1c will undoubtedly trigger a new wave of planetary research around similar stars. About 80% of the stars near the earth are red dwarfs.

Xavier Pomfils of Lisbon Observatory, one of the discoverers of Gliese 58 1c, said, "Today, we may find more livable planets. Astronomers may eventually find dozens or even hundreds of livable planets, but in any case, Gliese 58 1c will definitely go down in the annals of astronomy as the first livable planet outside the solar system. "

The existence of Gliese 58 1c also provides us with an open astronomical perspective. After all, space navigation is an ongoing and necessary research and plan. As Xavier Delfossi, an astronomer at the University of Grenoble in France, said in a statement: "As we all know, liquid water is a necessary condition for life. Given its temperature and relative proximity, this planet is likely to be a very important goal for future space missions dedicated to finding extraterrestrial life. "