The blue planet in front of you is about 100,000 kilometers away from the "Nautilus", this planet is all blue, and you can faintly see the "smoke" produced outside the atmosphere, which is extremely spectacular and beautiful.

Looking in the direction of the sun from here, the sun is about the size of a three-dollar wine cup, and the brightness can be said to be reasonable. It is enough to see that this place is extremely far from the sun.

Han. Zheng nodded and said, "That's right, this planet should be Neptune." ”

Han. He said in a very affirmative tone, and it was clear that he recognized the planet. But Han. Zheng still explained: "Actually, I have never really seen Neptune, and most of the pictures of Neptune I have seen before are made by computers, even the photos of Neptune released by the United States many years ago by 'Voyager II' are not so clear." ”

After a pause, Han. Zheng continued: "However, although I have not seen the real Neptune up close, the various characteristics of this planet are consistent with the characteristics of Neptune, such as this blue atmosphere. Because Neptune's atmosphere contains about 13% methane gas, it makes the planet look blue, and do you see the smoke on the surface of the planet's atmosphere? That's when the solar wind and methane interact. ”

Alexander interjected on the side: "Han, but Uranus is also blue, and the methane content in Uranus's atmosphere is higher than that of Neptune, so Uranus's color looks more beautiful." ”

"Alexander, you're right, Uranus and Neptune are really indistinguishable from each other in terms of appearance, and these two planets are similar in size, mass, and appearance. It's just that you forgot an important key factor, and that is what the satellite ring looks like. ”

"Satellite rings?" Tang Feng asked puzzled.

Han. "There are many planets in the solar system that have beautiful moon rings, the most famous of which is naturally Saturn's rings, but in addition to Saturn's rings, Uranus, Neptune and Jupiter also have moon rings. But of all the planets in the solar system that have satellite rings, only Uranus's moon rings are the most peculiar. For example, the rings of Saturn, Jupiter, and Neptune's moons are horizontal, so Uranus's moons are vertical, so they are easy to identify. And the planet's moon rings, I think, are horizontal, plus the color of the planet's atmosphere, so I judge that this is Neptune and not Uranus. ”

Alexander said unconvinced: "Han, how can you judge that the satellite ring of this planet is horizontal?" I think it's upright. ”

Tang Feng laughed and said, "Where is there a satellite ring on this planet, why didn't I see it?" ”

As soon as these words came out, both of them were immediately speechless.

The so-called moon rings are invisible to all planets except the most spectacular rings of Saturn, which can be seen in space with the naked eye. Moreover, the rings of satellites that are seen from a very long distance with an astronomical telescope are also invisible. It's as if the current location of the "Nautilus" is only 100,000 kilometers away from this blue planet, and at this distance, even in Saturn, you can't see the spectacular rings of Saturn, but just a hazy detrimental material.

Just listened to Han. is talking about having a nose and eyes, Tang Feng also thinks that this is really Neptune. Can last Han. actually came up with a "I think", which immediately made Tang Feng cry and laugh. It turns out that Han has always been upright. I also act by feeling.

"I said, you two don't have to argue, let's look here and see where we are now." Tang Feng said, pressing a few buttons on the console with his hand, and as a result, the ceiling in the cabin of the "Nautilus" immediately changed into the appearance of a starry sky, and it was a huge starry sky map, which contained hundreds of river systems.

"Damn, it's so beautiful!" Han. Looking blankly at the star map above his head, Harazi almost flowed out.

In fact, what Old Man Andro left Tang Feng was not only the "Nautilus" and the method of condensing the star core, but also the star map that he had put together all his life was also an extremely precious thing, and its value was not even under this "Nautilus".

You must know that walking in the vast space is often millions of light years away, and if you don't have an accurate star map, then you are likely to get lost in the vast space. And the old man Andro has walked in the universe in his life, and the galaxies he has been to are not a thousand but hundreds of them, coupled with the support of his family behind him, so that the old man Andro finally pieced together this star map that spans more than a billion light years.

It is no exaggeration to say that even if this star map is placed in the Star Alliance, it is one of the best existences.

It's a pity that Tang Feng and they haven't even gone out of the solar system yet, and the star map is really not as enjoyable as a bottle of 82-year-old Lafite for them.

But even so, the beauty and magnificence of this star map still completely shocked the three of them.

After a long time, Tang Feng came back to his senses, clicked on the console again, and saw that a certain point of this star map was rapidly enlarged, and a few seconds later, a complete star map of the solar system appeared above his head. The point of light representing the "Nautilus" is now quietly hovering next to the blue planet about 4.5 billion kilometers from the sun.

"Haha, Alexander, you're wrong! I'll just say, my feelings have always been very accurate, how about it, isn't this planet Neptune? One of the eight planets farthest from the Sun! ”

Alexander stared blankly at the star map above his head, and muttered, "Neptune is Neptune, but I'm still wondering how we came from Mars to Neptune in such a short time?" According to the distance from Mars to Neptune, even light would have to run for nearly four hours, but I don't think I've even been able to get past a minute. ”

The average distance of Neptune from the Sun is a little more than 4.5 billion kilometers, and the distance from Mars is 4.276 billion kilometers, a distance that even if it is light, it takes 237 minutes.

But just now, the three people on the ship all felt that they had only experienced a very short period of time, as if it was a start, an acceleration, and then a stop, and it really didn't feel like a minute, how could they have stuck their heads to Neptune, which is 4.2 billion kilometers away from Mars, how is this possible? (To be continued.) )