2018-11-16 07:52:13 Source: Reference Message
Original title: Researcher discovers that the "super earth" circles the star closest to the solar system
According to the British media, astronomers announced on November 14 that due to 20 years of scientific observations, an ice and dark planet called "Super Earth" can be located near the isolated stars 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 the Earth, and it turned out to be running around Barnard Star. Barnard Star is a relatively low temperature and small mass star. It is called "red dwarf star". It is about 6 light years from the solar system and is relatively close to the universe. The planet is meant to drive a circle around Barnard every 233 days.
Planets circling around stars outside the solar system are called exoplanets. We have discovered nearly 4000 exoplanets. This newly discovered exoplanet is the second closest exoplanet discovered to the solar system. It is considered a "super ground", a type of planet that is larger than the earth's mass but less than the mass of a large gas plane.
Ignacy Rivas, a researcher at the Space Research Institute of Catalonia and the Space Science Institute in Spain, said in a statement: "After a very careful analysis, we have 99% confidence in the planet there. He said," But we will continue to observe it this quick star to rule out the natural variation of the star-shaped brightness that may exist – but unlikely – for this change to be mistaken for a planet. "
The only star closer to the solar system than Barnard is Samsung's Alpha Centauri system, which lies a little more than four light years from the solar system. Two years ago, astronomers announced the discovery of a planet resembling Earth in the Alpha Galaxy in Centaurus. Its orbital makes it possible to have floating water on the surface, increasing the possibility of alien life on it.
This new planet that runs around Barnard Star can not be equally responsible. Its surface temperature can be around minus 170 degrees Celsius. Barnard's energy for this frozen planet is only 2% of the energy the sun gives to earth.
Researchers have combined the measurements of several high precision instruments mounted on telescopes around the world to study the planet.
This research report has been published in the British newspaper Nature.