A little further away than South Gate II is the star Barnard, about 6 light years away, and it is in the other direction - Ophiuchus, which is also the current direction of Voyager 1.

Barnard is known for his very fast speeds and will become the closest star to the sun in ten thousand years.

A little further away is Luman 16, a binary star system composed of two brown dwarfs, located 6.5 light years away, which is the brown dwarf known to be closest to the solar system.

Although these two brown dwarfs are very close to us, they were not discovered until 2013 because brown dwarfs are very dark and their mass is not enough to undergo hydrogen fusion like stars. Lumann 16a and b are both about 3% of the sun's mass, which is 30 times that of Jupiter.

wise     0855-0714 is located 7.3 light years away. It is a secondary brown dwarf with a mass no more than 10 times that of Jupiter and has not yet reached the lower limit of the mass of the brown dwarf (13 times the mass of Jupiter). Its surface temperature is very low, only a few dozen degrees below zero.

Wolf 359 is the fifth closest star to the sun, and it is located 7.9 light years away. Wolf 359 is a red dwarf with a mass of about one tenth of the sun. At present, astronomers have discovered two planets around this planet, one can reach 44 times the mass of the earth and the other 3.8 times the mass of the earth.

Laland 21185 is another red dwarf that is closer to the solar system, which is located 8.2 light years away. The star is currently approaching the solar system, and it will run 4.7 light years away from us in 20,000 years. Observation data shows that there is a planet around the star.

8.6 light years away, it is the famous Sirius binary system. The main star Sirius A is twice the mass of the sun and its actual brightness is 25 times that of the sun. It is the brightest star we can see in the naked eye in the night sky of the earth.

The companion star Sirius b is a white dwarf, which is a dead star.

Lutan 726-8 is the closest red dwarf binary system to the solar system, 8.7 light years away from us. The mass of the main star is one-seventh of the sun, and the mass of the companion star is one-tenth of the sun.

Ross 154 is the farthest known star in 10 light years around the sun, with a distance of 9.6 light years. Ross 154 is a red dwarf with a mass of about one-sixth of the sun. This star is a glorious star, and there will be an explosion of flares every two days on average. If there are planets in the habitable zone around the star, it will suffer from strong stellar radiation.

...

These stars (brown dwarfs) are distributed within ten light years of the radius of the sphere centered on the sun. According to Chen Yu's plan, after the solar orbital array telescope is built, the extreme planetary systems of these stars will be imaged to ensure that there will be no problems, and then the pace of finding alien civilizations will be gradually expanded outward.

Seeing that Chen Yu was immersed in learning, Ruan Qingxue quietly unveiled the courtyard.

For the next period of time, Chen Yu stayed peacefully in the courtyard and studied the distribution of major stars within a solar system radius of one hundred light years.

Occasionally, I went out to help Xu Zhengye and others find the technical information needed for the Hongan Project.

Or go to space and give humans some information about the current situation of major planets.

A month passed in a flash.

Early March 2022.

Chuncheng Optical Machinery Research Institute.

Although it is early spring, the optical and mechanical facilities located in the northeast are still in ice and snow.

Accompanied by Chen Yu Haitian, Xu Zhengye and relevant leaders of Chuncheng Optical and Mechanical Institute, Chen Yu walked into the Advanced Equipment Technology Manufacturing Center of the Optical and Mechanical Institute.

In an independently separated hall in the manufacturing center, a big guy three or four floors high is placed upright, and the area the basketball court next to it is filled with various parts of large and small sizes!

"Mr. Chen, this is the prototype of our space survey telescope. This telescope consists of a survey module, a terahertz module, a multi-channel imager, an integral field of view spectrometer and an exoplanet imaging coronameter. It can conduct large-scale surveys and provide a surveying ability with a resolution of approximately the same as the Hubble Telescope, but its field of view is more than 300 times larger. It will help astronomers observe more than 1 billion galaxies, determine the location, shape, brightness of these galaxies, and draw the structure and evolution of the universe. It can also use the gravitational lensing effect of the sun to finely image the planetary systems of all stars within a hundred light years, helping us better search for extraterrestrial civilizations. At the same time, it is also equipped with six Kowloon Hall thrusters, which can perform orbital fine-tuning in a small range..."

Xu Hu, the chief designer of the Sky Survey Telescope, said excitedly.

Chen Yu pointed to the parts next to the telescope and said, "Are these parts of the telescope split?"

Xu Hu nodded and said, "Yes, according to your requirements, we have further optimized the design of the Space Survey Telescope to ensure that the mass of each component does not exceed 130 kilograms. After disassembly, the telescope is divided into six structural parts, each structural part contains about 1,000 parts. If assembled in space, it will take at least 10,000 working hours for a single person to complete the assembly."

Chen Yu nodded and turned his head to look at Yu Haitian on the side: "Academician Yu, how many astronauts can perform missions now?"

Yu Haitian said: "Twenty-five people!"

"Ten thousand working hours, twenty-five people, an average of four hundred working hours per person. Considering that the out-of-cabin spacesuit supports up to eight hours of working hours per day, we have to set aside at least two months!"

Yu Haitian said: "Mr. Chen, can we actually use three shifts to shorten the assembly time?"

"Three shifts?"

Chen Yu was stunned and frowned: "But I can't send the astronauts back to Earth during the day!"

Yu Haitian smiled and said, "We have considered this situation. Before, considering that you can only send astronauts wearing space suits in the cabin to enter space, we designed a small space station system. This space station adopts a nested structure and the survival system is relatively simple. It can only maintain supplies for eight astronauts a week, and it is easy to assemble. You can first deploy this small space station to the focus of the solar gravitational lens, then send the astronauts over, change the space suits outside the cabin, and then assemble the sky patrol telescope! Every time eight astronauts leave the cabin to work, eight astronauts rest in the space station, and eight astronauts are on standby on the ground. In this way, one group is rotated every three days, and you only need to bring the rotated astronaut crew back every day and deliver the corresponding supplies. If nothing unexpected happens, the assembly can be completed in about a month!"

"Okay, then let's make this arrangement first!"

Chen Yu patted his head and felt a little tired.
Chapter completed!