Live Wilderness Adventure

Chapter 187 Never stop

The audience has not recovered from the storm, and Bi Fang is about to embark on a journey again, which makes people worry whether the intensity of migration is too high.

The lightning and thunder a few hours ago are still vivid in their minds, and the majesty of the sky cannot be looked directly at. Under such circumstances, ordinary people dare not even go out, let alone fly a plane through the storm, and the front-loading washing machine does not turn like this .

[Is Fang Shen no longer a human being? If yes, can you take me with you? I don't want to either. 】

【Flying at night, can wild geese keep up? 】

[Yeah, it's dark and not autumnal, will nothing happen? 】

[Just a few hours, can you rest? 】

"Of course I can. In fact, geese and birds migrate mostly at dusk or at night, and I chose daytime because it is in line with human habits."

"And don't underestimate the resilience and endurance of geese, they are one of the few birds that can fly the entire Himalayas."

Bi Fang pulled the engine, and in the night, the glider flew across the sky like a giant black bird. With it as eyes, 18 wild geese lined up neatly behind it.

"Speaking of which, I seldom drive by at night. When it comes to night, I have to mention the starry sky."

Breathing the water vapor with the salty wind, Bi Fang turned the camera to Hoshino, and the endless starry sky revolved above his head.

"As early as thousands of years ago, our ancestors had already begun to use the movement of celestial bodies to determine the orientation. If you can judge your own orientation through the movement of the sun, moon and stars, then even without navigation tools, you It’s also possible to find the right direction.”

[I know this, find Polaris! 】

[There is also the Big Dipper, I have learned this in kindergarten! 】

【Ah, isn't the Big Dipper the North Star...】

[I opened the door and looked, wow, there are no stars! 】

Due to the timing of the live broadcast, the number of people in the live broadcast room dropped a lot, from more than 200,000 to about 100,000, but there was no shortage of barrage, and the enthusiasm of the audience was still high.

Bi Fang estimated that it should be nine o'clock in the evening, and it should be two o'clock in the morning in China, so there are still so many people active?

But people nowadays really lack some common sense, and they can't even tell the difference between the North Star and the Big Dipper.

Bi Fang sighed silently. In fact, he can also understand that people nowadays basically live in cities. At night, the only light in the sky is the moon. Occasionally, the clouds are thicker, and even the moon cannot be seen. In this case, who cares what the name of the invisible star is?

"Although the names of the Big Dipper and the Polaris sound similar, they are completely different things. First of all, the number is different. The Polaris is the name of a star; the Big Dipper is composed of seven stars. It's called 'Big Dipper'."

"Secondly, the functions of the two are also different. The Polaris can accurately point out the direction of true north; and the role of the Big Dipper is to help us find the Polaris. The Polaris is on the extension line connecting the two stars below it."

Bi Fang raised his head to look up at the starry sky, and talked about some photo-finding and identification skills. In the first person, the audience directly followed his perspective to find the so-called Big Dipper.

"Polaris is the brightest star in the constellation of Ursa Minor. But since all the stars in Ursa Minor are dimmer except for Polaris, we usually need to find Polaris based on the Big Dipper."

"The Big Dipper is the main body of the constellation Ursa Major. It is located at the tail of the Great Bear. It is shaped like a spoon. The target range is larger, and it is faster and more convenient to confirm a single target Polaris through it."

Among the seven stars of the Big Dipper, six are 2nd-magnitude stars and 1 is 3rd-magnitude star. It is very easy to identify, especially in an open and less polluted place like the sea. Once you see it, you will never forget it.

The night sky was clear, and the sky was full of clear light, as if a traveler came to the silent moonlit night and found the way home according to God's guidance.

[Fuck, it's the first time I've really seen the Big Dipper when I grow up so old! 】

【Mom, I'm promising! 】

【Look at your potential! 】

[Staying up late to see the Big Dipper is worth it! 】

[Because I often stay up late, my liver seems to be not very good, can everyone call me a little liver? 】

"From the two stars on the side of the mouth, that is, the pole star, extend about 5 times to the outside of the mouth, and we can find our target. The most important star in the northern hemisphere that indicates the direction, the Polaris, see it?"

Bi Fang stretched out his fingers and turned his gaze along the line, and the audience quickly spotted the brightest star in the night sky.

"There is no star brighter than Polaris in a fairly large area around it, so it is extremely easy to find it in this way."

"On the background of the starry sky, the Polaris is less than 1 degree away from the North Pole. When we find the Polaris at night, we basically find the true north."

Knowing the direction, Bi Fang accelerated the speed of the plane, bringing a howling wind through the sky.

【Wow, it's so bright】

[The brightness is not at the same level as other stars! 】

"Of course, Polaris is one of the few first-class stars."

Bi Fang is very happy, this feeling of sharing the beauty with others is very good, just like having teammates by his side in the previous life.

Etienne in the back row was also obsessed with the starry sky, and asked curiously when he heard the concept of a first-class star: "What is a first-class star?"

"Ah, this..." Bi Fang scratched his head, "The brightness of the stars is different, and it is related to the temperature and distance of the stars, you know that?"

"Uh-huh."

"It is said that Hipparchus, the ancient Greek, divided the starlight into 6 grades according to the difference in brightness. The 1st grade star is the brightest and the 6th grade star is the darkest. The brightness difference between each grade is about 2.5 times. In fact, There is a 100-fold difference in brightness between a 1st magnitude star and a 6th magnitude star. But this level statement has continued, regardless of the distance of the star, it is the brightness that we show when we look at the stars on the earth."

Etienne suddenly realized that this was the first time he had heard of this hierarchy concept: "Is there any star brighter than Polaris?"

"Of course, the division of six grades is very rough. Later, scientists formulated more grades. If a star is brighter than Altair, then its magnitude is 0th magnitude, and Vega is 0th magnitude star."

Bi Fang changed the subject for a while. With Polaris, as long as the sky is not cloudy, it is impossible to get lost at night, so you can drive boldly with confidence.

Etienne in the back seat looked at the shining North Star and asked, "Will the position of the North Star not change?"

"That's a good question." Bi Fang didn't expect Etienne to ask this question, but it was within the scope of his knowledge. In his previous life, he asked the old professor exactly the same question, "I can tell you with certainty. , will change."

"The rotation axis of the earth will turn, let alone the North Star. In the vast universe, the speed of the solar system can be said to be slower than that of a snail. Only after a long time, the relative position of the North Star seen on the earth will happen. Obvious changes. But as time goes by, it will leave due north sooner or later."

"So Polaris actually refers to 'the star closest to the north celestial pole'. We can simply understand this as the star that the north end of the earth's rotation axis points to is Polaris. This is a definition, and there is no definition will change."

"Polaris is not a special name for a certain star, but it is held by different stars in turn. When the star we call Polaris leaves the true north, people on earth will turn the north end of the earth's rotation axis The other star it points to is called Polaris."

"The current Polaris is 'Gouchen 1', also known as 'Alpha Ursa Minor'. It is still approaching the North Pole at present, but after 500 years, it will become 'Gouchen 4', so the judgment of Polaris The only way is to use the connection of the Big Dipper."

Bi Fang's explanation once again shocked the numb audience.

You are an expert in survival in the wilderness, and it is not too much to use the stars to judge the direction, but even knowing this, isn't it a bit inappropriate?

[Fuck, after the great mathematician, physicist, geographer, and climatologist, has Lao Fang awakened the skill of astronomer again? 】

[Off the scale, what else do you not know? Be honest! 】

[False explorer: proficient in mathematics, physics, geography, climate, astronomy, real explorer: with his blood, let his teammates save him. 】

The audience's praise made Bi Fang blush. He also knew this knowledge by accident. If Etienne hadn't asked, he wouldn't have remembered it.

After coughing twice, Bi Fang changed the subject and talked about some other methods of judging the direction.

"In addition to Polaris, we can also use the Orion constellation to determine the orientation in the dark night sky. Orion is surrounded by 4 bright stars to form a large quadrilateral, and the center of the quadrilateral is 3 small stars side by side. We can use the small An imaginary horizontal line drawn by the stars is the celestial equator, and this line is the east-west line."

"Of course, if it is the southern hemisphere, it will be different. The Big Dipper may be hidden below the horizon. I will tell you when I arrive in the southern hemisphere."

【Southern Hemisphere? what's there 】

[Antarctica, or Australia]

[Why are you still hiding it? I don't agree! 】

"Ahem, I'm done talking. What shall I talk about later?" Bi Fang spread his hands, "But it's not enough just to have a direction. Our route is planned. We're going to Denmark, and flying to Holland or Copenhagen is not enough." Alright, so we're going to use the stars not only for directions, but also for latitude and longitude!"