【Revision】
During the New Year holiday, Wu Hao could finally rest for a few days. The only bad thing is that Lin Wei has been giving him a lot of looks in the past few days, and she is obviously still immersed in the proposal scene between Zhang Jun and Wei Xiaoya.
The return of parents and sister also made the whole family feel much warmer. Usually it's just the two of them, and to be honest it's a bit deserted. My parents' house hasn't been renovated yet, so I haven't moved there yet.
The smell still needs to be dispersed after the renovation is completed, and it is estimated that we will not be able to move there until next summer. Fortunately, there is no rush on this matter. Anyway, my parents plan to celebrate the New Year in the South China Sea this year.
They were used to staying there. The day after their parents came back, they complained to Wu Hao and the others that the weather here in Anxi was too cold and the air was too bad. So they planned to stay at home for a few days and then return to the South China Sea.
Especially his father, Wu Jianhua, became obsessed with sea fishing in the South China Sea. It should be said that not only Wu Jianhua, but Zhang Jun and his father are also obsessed with sea fishing. Now I am floating on the sea almost every day, and I want to adjust to something big.
In addition, there is plenty of sunshine and strong light in the South China Sea, so this time when their parents came back, Wu Hao found that his father's skin was darker, so dark that he thought he came back from Africa.
However, there are also good changes, that is, my father's stomach has reduced a lot, and he seems to be much more energetic. In his words, tug-of-war with a 100-pound big fish every day is considered an overload of exercise, and it can't be bad for your health.
In the backyard of the house, a bonfire was slowly burning. Although it is difficult to use open fires in cities now, it does not have much impact on Wu Hao and others, and they can afford it. It's like the wood used in this bonfire is all fruit wood pulled back from the outside. It is very resistant to burning and has a scent.
In Beijing, fruit wood is a necessary wood for roasting duck, so it is much more expensive than ordinary wood. Plus shipping and other expenses, it is not cheap anyway.
In fact, charcoal is the best for baking fires because it burns fully, smoke-free, and has less dust. Nowadays, there are also natural gas stoves, which are cleaner.
But in terms of mood, burning fruit wood is better and more atmospheric. Atmosphere is difficult to measure and define, it all depends on personal preference. For example, the stove in the backyard was actually designed and installed at Lin Wei's strong request. If the decoration style of the home was not suitable for the fireplace, she would have built and installed the fireplace long ago.
After adding two pieces of fruit wood to the stove, Wu Hao leaned on an armchair and put a blanket on his legs, then leisurely picked up a book and started reading.
Although e-books are now very developed and physical books are gradually declining, Wu Hao still likes to read such physical books. Especially the tactile feeling when turning over the paper, and the magic that the new book exudes, is very good.
Although he is usually busy and has very little time to read, he will find some books to read whenever he has time to enrich and improve himself.
While she was looking fascinated, Lin Wei came to sit opposite her holding a blanket and asked, "What book are you reading? How can you be fascinated?"
Wu Hao, whose train of thought was interrupted, lifted up the book helplessly and said: ""Cosmos", a masterpiece by the famous astronomer Carl Sagan."
Oh, Lin Wei nodded when he heard this, then picked up the water glass and took a sip, and then asked: "Does it look good?"
not bad. Wu Hao nodded and said, "Although this book is almost fifty years old, it is still timely and I am still very inspired by it."
Speaking of this, Wu Hao picked up the water glass and took a sip, and then said: "Of course, after all, the book was written fifty years ago, and there are some limitations, so read it dialectically."
Speaking of this, Wu Hao picked up the water glass and took a sip, and then said: "Of course, after all, the book was written fifty years ago, and there are some limitations, so read it dialectically."
Hearing Wu Hao's words, Lin Wei nodded, then looked at the dancing flames in front of her and asked: "We always talk about the universe, so what does the universe look like and how big is it?"
Seeing Lin Wei raise such a question, Wu Hao closed the book and looked at the other party with a smile: "I don't know, the universe we are talking about at present is only the observable universe. With the Earth as the center, the radius is about 46.5 billion light years, and the diameter range is about The 93-billion-year-old cosmic space ball is the universe we can currently see.
But outside this range, it is unclear what the universe looks like, whether it has boundaries, and what it looks like outside the universe.
However, we can also use our imagination based on the existing foundation.
Assuming that the universe has boundaries, then the universe we live in is like a drop of water. The so-called boundary is actually the boundary of this drop of water, and beyond this drop of water, there are rivers, lakes and seas composed of countless drops of water.
As for our Milky Way, it is just an invisible existence among the dust inside this drop of water, so naturally we will not feel what is outside the water droplet.
So the question is, what is outside the world composed of these rivers and rivers? I don’t know, I don’t know. "
Speaking of this, Wu Hao glanced at Lin Wei, then smiled and continued: "Assuming that the universe has no boundaries, what does it look like? Maybe it is just chaos.
Time and space are intertwined and superimposed in multiple dimensions, so naturally there is no concept of boundaries. "
Too abstract. Lin Wei shook her head, then leaned over and picked up an orange on the coffee table, peeling it, and asked Wu Hao, "Tell me something closer, when can we get out of the solar system."
Forehead……
Wu Hao shook his head helplessly when he heard this question, then took the orange slice from Lin Wei with his mouth, and said while eating: "I don't know, in fact, Lao Mi launched the Voyager 1 decades ago. and Voyager 2 still haven’t left the solar system.
Although according to Lao Mi’s news, one of the Voyager 1 probes has flown out of the heliosphere, this is not the boundary of the solar system. There is also an Oort cloud outside the heliosphere, which ranges from approximately It is 50,000 AU (about 1 light-year) away from the sun and extends to 100,000 AU (1.87 light-years). Only when it flies out of the Oort cloud can it truly fly out of the solar system.
At the current speed of Voyager 1, it is estimated that it will take 30,000 years to fly out of this Oort cloud. Of course, these are all speculations. After all, we still don’t understand the moon, let alone the solar system.
Although the solar system is just a drop in the ocean compared to the vast universe, it is too huge for our earth and humans.
Therefore, for us humans, it does not make much practical sense to rush out of the solar system and search for extraterrestrial civilizations.
The most important thing we should do now is to get out of the earth and explore the entire solar system. Only when we have thoroughly explored the entire solar system and made it available for us to sail freely like the ocean on our earth, will it be time for us to go out of the solar system and explore the outer universe. "
(End of chapter)
