In the astronomy of human civilization, the classification of stars in the universe is based on the temperature of the photosphere, accompanied by spectral properties and subsequent derived properties. Wien's displacement law can measure the temperature of an object's surface in spectral degrees, but it is very difficult for distant stars.

The Harvard University Observatory in the United States has conducted an in-depth study of the spectroscopy of 500,000 stars. They classified the 500,000 stars according to their different spectral lines, and found that they also had a relationship with color.

Later, the spectrum of stars was divided into seven categories: blue, blue-white, white, yellow-white, yellow-white, yellow, orange, and red.

Barnard is a red "M" star, and at the same time, on a Jedi magnitude, it reaches 4! But even though Barnard is an M4-type red dwarf, it still seems much fainter because of the distance. Observers must use a telescope to see.

In the past, many astronomical scientists have analyzed and predicted that Barnard's age is between 7 billion and 12 billion years old, which is much older than the Sun. And many astronomers believe it may be the oldest star in the Milky Way.

Today's Barnard has lost a lot of rotational energy, and the periodic variation of luminosity shows that it takes 130 days for Barnard to rotate around in 1 cycle, compared to 25 days for the Sun.

Because Barnard is considered an ancient star, it has long been assumed to be a dormant star, but astronomers observed a strong stellar flare more than 20 years ago! So Barnard Star is actually still a shining star!

A flare is a star whose luminosity changes unpredictably. It can unpredictably and dramatically brighten over a period of minutes, sometimes changing more than a few magnitudes within a few minutes, and then slowly recovering after a few minutes to hours. And the bright stars are usually more complicated.

"Four?" Chen Mengchuan was stunned.

"Yes, Yumekawa, we have discovered 4 planets, one of which is even bigger than Jupiter! The planet revolves around the star Barnard, which is at least 1 full times larger than Jupiter! And the position of the planet is very close to Barnard's star, the planet has a rotation, and because of the huge size of the planet, the temperature of the planet changes very frequently, the planet has two poles, and there are enough glaciers to cover the poles. The planet's minimum temperature is estimated to be between minus 90 degrees Celsius and minus 120 degrees Celsius. The maximum temperature is expected to be between 80 degrees Celsius and 110 degrees Celsius. ”

"Did you find any signs of life?" Chen Mengchuan's heart suddenly beat violently.

Toni took a deep breath and said, "Green vegetation!" There's a lot of green vegetation on this planet! It...... It's as beautiful as the earth. ”

Chen Mengchuan was stunned for a moment, there was some disbelief, he raised his head and looked at Toni seriously.

There were many sparkles in Toni's eye sockets.

"Say it again!" Chen Mengchuan trembled a little.

"Our instrumentation analyzed the presence of a large amount of green vegetation on the planet and confirmed that it exists in the two Tropic of Cancer ranges of the planet. The temperature in the range of this Tropic of Cancer is suitable for human survival, if the environment is suitable! Toni's voice trembled.

Chen Mengchuan's heart suddenly beat violently, and the whole person's emotions suddenly became uncontrollable, and his eyes were surging.

He took a deep breath, closed his eyes, and wiped his eyes a few times: "Go to the project team!" ”

"Okay."

The two soon arrived at the Barnard Galaxy Exploration Project team.

There are more than 70 people in the entire project team. At this time, everyone's emotions were very enthusiastic, and many people hugged each other and burst into tears.

This is the first planet discovered by mankind that could be suitable for human existence in the true sense of the word!

The arrival of Chen Mengchuan and Toni soon made the entire project team even more excited. Chen Mengchuan has a special meaning among all the human beings in the Earth Federation, as if he is like a guide and godfather.

"Brother Chuan."

"Brother Chuan......"

The project team excitedly greeted Chen Mengchuan.

"Yumekawa, the data is here." Toni led Chen Mengchuan to another large gravitational screen.

In the center of the screen, a 3D round planet is slowly rotating, the colors of the planet are distinct, unusually beautiful, the two polar regions have thick ice caps, the core equatorial region is a reddish, a large number of blue oceans are intertwined, the Tropic of Cancer region and the Tropic of Cancer region are touching green, and the whole planet is under the thick atmosphere, which seems to be a bit smoky and unusually beautiful. And the outer perimeter of the planet is surrounded by a circle of brown star rings.

"Yumekawa, we should immediately organize an in-depth exploration spacecraft to explore this planet!" Toni said.

His words thrilled everyone around him.

Chen Mengchuan looked greedily at this incredibly beautiful planet, and his hand involuntarily stretched out, as if he wanted to touch this planet.

"Yumekawa."

Chen Mengchuan closed his eyes and tried hard to suppress his excitement.

"Go! Must go! Prepare ten groups of in-depth exploration spacecraft, this planet is too big, and it will take us very, very long to complete the exploration of this planet! I have a hunch that this planet is going to surprise us. Chen Mengchuan opened his eyes again, his eyes were a little red, and his gaze was very firm.

"Good! I immediately asked Ah Chen to arrange it. Toni was so excited that she danced.

The entire project team burst into an unusually excited cheer in an instant!

Chen Mengchuan turned a deaf ear in the face of this huge cheer, and his eyes were always focused on this beautiful planet.

Not far from this planet is the shining star Barnard.

He didn't expect that the Centaur system didn't surprise him, but the Barnard star system gave him a huge surprise.

However, in addition to the joy and joy, he also had some different expectations in his heart.

How many life forms will there be on such a huge planet suitable for life, and will there be life races in these life forms that have evolved into advanced intelligent civilizations? If so, to what extent have they reached the level of civilization? Compared with today's human civilization, is it advanced or backward?

If they are more advanced than human civilization, then why did they not come to mankind?

If their civilization level is lower than that of humans, how should humans view them?

Chen Mengchuan's thoughts suddenly drifted to this huge earth-like planet, it was too beautiful and beautiful, this kind of beauty, people couldn't help but want to pounce on it, desperate to pounce on it.