Neptune fiddled with the free observation equipment on the plane to observe the distribution of sea and land around the plane.

It can be confirmed that the cracked distribution of sea and land tortoises can be confirmed, but whether it is the junction of sea and land or the inside of blocky land, it can be said that it is very flat.

Within a radius of thousands of kilometers, there are endless plains with no obvious ups and downs, let alone tall mountains.

This made Neptune a little confused and immediately retrieved incomplete satellite data and data observed during the aircraft entering the atmosphere.

Then Neptune confirmed a more peculiar phenomenon. Within tens of thousands of kilometers that have been roughly scanned, all land is a large plain and there are no obvious mountains at all.

"In theory, the lower the gravity on the surface of the planet, the greater the undulation of the terrain. The height of Mount Olympus on Mars is more than 20 kilometers, more than twice as high as Mount Everest.

"But Mount Olympus on Mars is a volcano... Wait, are there no volcanoes on this big moon?"

Neptune immediately searched for the existing information, but he really couldn't find similar reports and instructions.

In fact, volcanoes are also mountains. In the previous search of Neptune, no obvious ups and downs on the ground were found, which can already indicate that there is no volcano...

Neptune continued to observe the planet's surface with a shocked expression, and soon realized again that not only the ground here was too flat, but the sea surface was also too clean...

Except for the edges of the coastline, there are basically no islands in the ocean that are similar to debris.

The arc islands like the Aleutian Islands, Ryukyu Islands, and Kamchatka do not exist at all.

This kind of island arc is formed by volcanoes, earthquakes and orogenic movements caused by crustal movement and plate movement.

"There is no such thing on this planet. Does it mean there is no crust or plate movement? Does it mean that Sister Yuanwang's guess is unreasonable?

"Then how do these large square grids form? The shape is irregular and doesn't look like they were dug by hand?"

Neptune thought for a long time and analyzed various possible situations, but never found any reasonable explanation.

Considering that the aerospace plane has a limited range in the atmosphere, it is impossible to stay suspended in the atmosphere.

Neptune can only stop thinking temporarily, record these situations and thoughts, divert attention and continue to observe the scene below.

The nearly boundless plain is mostly covered with dense vegetation, yellow-green and orange jungle...

Looking at these things up close, it feels very strange.

Just looking at the colors, life from the earth may subconsciously think that it is autumn.

But where Neptune's planes enter the atmosphere, the northern hemisphere region of the Great Moon is currently in summer.

All plants are growing rapidly, in a vibrant state, completely different from the autumn that is about to wither.

At the same time, Neptune discovered that the coverage of these vegetation is very large, and there is basically no exposed soil in the entire field of view.

This shows that the planet's climate is very suitable for the growth of plants here, and the land should be relatively fertile.

At the same time, since the land is divided, the distant inland that cannot be reached without water vapor, and the precipitation in most land is relatively uniform.

Neptune adjusted the focal length of the lens, carefully observed the status of those plants, and again confirmed that they were very different from the plants on the ship girl planet and the earth.

First of all, the giant plants with an extremely tall height of more than 200 meters. The big guy who broke through the earth's tree record can be said to be everywhere here.

Gu Qi

And they do not seem to be "trees", they should be said to be not quilts and gymnosperms commonly found in the trees on Earth, but a huge fern-like plant.

On Earth, even the ferns from the dinosaur era were only 40 or 50 meters tall, and plants four times their heights were everywhere.

Moreover, these plants are very dense, and large plants in many places grow almost shoulder to shoulder.

Like ferns, there are basically no branches and leaves on the trunk below, only a blooming canopy, competing with each other to absorb sunlight and stretch the height upwards.

These plants grow so tall, perhaps because of the low gravity here, but if they are so dense, the oxygen content of the air will not be too low...

Neptune thought so in his mind, and retrieved the air data currently obtained and took a look:

"Good guy! 38.9%! This is a little higher than the highest level in the history of the earth!

"With such a high oxygen content, no wonder the plane flies so vigorously. Its broken aerodynamic appearance can fly three times the speed of sound...

"However, too high oxygen content can lead to a decrease in temperature...

"The stars on this planet are originally smaller than the sun and have relatively lower temperatures. The distance between the planet and the stars is equivalent to that between the earth and the sun, so the heat obtained by the planet from the stars should be significantly lower than that of the earth...

"However, the air temperature on the surface of this planet seems not only not lower than that of the earth, but is slightly higher...

"This should mean... the greenhouse gas content is also out of stock. What is the concentration of carbon dioxide? Is the capacity of carbon dioxide enough? Is there methane in the air?"

When Neptune went to check the greenhouse gas content, the radar screen around him suddenly flashed, and an automatic voice reminder was issued:

"At 11 o'clock in the direction, with an altitude of 19,866 meters and a distance of 168 kilometers, a large flying object was found, and its lateral width was predicted to exceed 20 meters, and its flight speed was about 386 kilometers per hour. Please avoid it in advance."

Neptune's aircraft is designed as a transport aircraft, not a fighter jet, so although it is equipped with fighter-level radar, the voice intelligent system is similar to a home car.

Now, this very ordinary avoidance reminder was shocked by all four ship girls.

"Where is something inside this planet with a height of nearly 20,000 meters and a width of more than 20 meters, what the hell is this?"

"It can't be a bird, right?"

"A bird with a wingspan of twenty meters? The winged dragon is not that big!"

Neptune no longer watched greenhouse gases, so he was very energetic and carefully looked at the scanning of the radar screen.

Find the thing scanned by the radar, amplify the feedback image of the other party, and get a cross-shaped spot...

"You can't tell anything... Both planes and birds can be like this..."

"But it can't be an airplane. There is no sign of any civilization that can create its own flight machinery...

"A bird with a wingspan of 20 meters? I have to go over and take a look..."

After a very brief consideration, Neptune took over the control of the aircraft again, adjusted the course slightly, and flew towards the thing.

Eight minutes later, the thing appeared in the optical observation equipment of the Neptune plane.

Looking at this guy's appearance, Neptune's eyes widened:
Chapter completed!