"Super Earth" was discovered around the star rotation from the solar system2018-11-16 10:26:18 45 ℃
Reference News Network reported on November 16 British media said that astronomers announced on November 14th based on 20 years of scientific observations, a cold and dark called "super earth" The planets may be orbiting around isolated stars that are closest to our solar system.
According to Reuters reported on November 14, the quality of this planet is estimated to be at least 3.2 times that of the Earth, and it was found to be running around Barnard Star. Barnard Star is a relatively low temperature and small mass star. It is called the "red dwarf star". It is about 6 light years away from the solar system and is relatively close in the universe. The planet is believed to run a circle around Barnard every 233 days.
A planet that orbits a star outside the solar system is called an exoplanet. We have discovered nearly 4,000 exoplanets. This newly discovered exoplanet is the second closest exoplanet discovered to the solar system. It is considered to be a "super-earth", a type of planet that is larger than the mass of the Earth but smaller than the mass of a large gas planet.
Ignacy Rivas, a researcher at the Catalonia Space Research Institute and the Space Science Institute in Spain, said in a statement: "After very careful analysis, we have 99% confidence in it. The planet is there," he said. "However, we will continue to observe this fast-moving star to rule out the natural changes in the brightness of the stars that may exist - but unlikely - because this change may It is mistaken for a planet.”
The only star closer to the solar system than Barnard is the Samsung system of the Alpha Centauri, which is located a little more than four light years from the solar system. Two years ago, astronomers announced the discovery of a planet similar in size to the Earth in the Alpha Galaxy in Centaurus. Its orbit makes it possible to have liquid water on its surface, increasing the possibility of alien life on it.
This new planet that orbits Barnard may not be as liable. Its surface temperature may be around minus 170 degrees Celsius. Barnard's energy for this frozen planet is only 2% of the energy the Sun provides to the Earth.
The researchers combined the measurements of multiple high-precision instruments mounted on telescopes around the world to study the planet.
This research report has been published in the British magazine Nature. (Compile / Wang Lei)
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