> "Ganymede is composed mainly of silicate rocks and ice, with star-layered stratification and an iron-rich, fluid core.

We speculate that 200 km below the surface of Ganymede, there is a saltwater ocean sandwiched between two layers of ice, which provides the environment necessary for life.

There are two main types of terrain on the Ganymede surface. The darker areas make up about one-third of the total area of the star, and are densely interspersed with impact craters and are estimated to be 4 billion years old.

The rest of the area is brighter, crisscrossed by a large number of grooves and ridges, and its geological age is slightly younger. The cause of the fractured geological formations in the bright area remains a mystery to this day, and it is possible that it was caused by tectonic activity caused by tidal heat. ”

Within the flagship, more information was gathered. Unfortunately, due to the destruction of the Earth's spiritual roots, the best planet in the solar system, the Alliance has lost interest in this area, so that the Alliance also does not have accurate information about the solar system.

Standing in front of the data desk to make an introduction was General David Lee, who was the chairman of the General Staff of the Great Western Kingdom.

"For us, Europa is a priority satellite that must be occupied, and it has an excellent geographical location.

Look here, Europa, Europa, and Europa are the most life-friendly planets among Jupiter's moons.

They are at a moderate distance from each other, and their orbits are close to each other, forming a structure that reflects each other.

Calliste's orbit is 1,07,400 kilometers away from Jupiter, and its orbit is 7 days and 3 hours.

Like most known moons of Jupiter, Europa is locked to Jupiter and always faces Jupiter on the same side, with a small eccentricity of its orbit and a small inclination of its orbit, close to Jupiter's equator.

The celestial position of Ganymede above is conducive to our attack on it, and if there is no forethought mistake, we believe that it is an important breeding base for Xenomorphs. ”

Zhang Binhui's eyes were fixed on Ganymede's parameters: the radius of the star, more than 2,600 kilometers; With a surface area of 87 million square kilometers, equivalent to two-tenths of the Earth's size, and the possibility of an ocean under the ice, such an environment is very suitable for the survival of aliens.

"What difficulties do we have if we attack it?"

In terms of large-scale corps combat command, Zhang Binhui knew that he had not yet started, so he asked very modestly.

David Li called up the celestial map of the three satellites: "Although it is easier to attack Ganymede than the other two satellites, there are still many unfavorable factors there.

The first is where it runs.

You see, Europa's orbit is in the outermost layer of the three moons, but it forms a relatively complete triangular position with the other two moons, and Europa is the spire of this triangle.

If we attack Europa, the aliens on Europa and Europa are very likely to come to their aid, putting a lot of pressure on our attacking troops. ”

Following David Li's guidance, everyone's eyes fell on the two satellites behind, although in terms of celestial distance, they were still more than five million kilometers apart, but in terms of the speed of alien space flight, this was not a problem.

"Not only that, but attacking Europa has one of the biggest problems, and it will greatly affect the use of our weapons.

Europa has a relatively powerful magnetosphere, and it is the only known magnetosphere moon in the solar system of Ganymede. ”

As General Lee explained, Europa's magnetic field graph was displayed.

"Ganymede's magnetosphere may have been created by the convective motion of an iron-rich fluid core, with a small amount of magnetosphere overlapping Jupiter's larger magnetic field, creating field lines that spread outward.

In the event of close-quarters combat, Europa's magnetos can interfere with our command and communications systems and even affect the performance of our combat weapons. The existence of this magnetic ring provides an excellent layer of help for alien defense. ”

Although David Li said seriously, he did not seem nervous. As Jupiter's neighbor, the Martians have long carried out research on it, and Zhang Binhui believes that they will be prepared.

Sure enough, David Lee went on to tell the headquarters' plan.

"In response to this situation, we have long been prepared in the Great Western Kingdom. Although we can't confirm the existence of aliens in the alien sky, since the last alien crossing event, we have begun to develop corresponding weapons in a targeted manner.

All ships and mechs are modular, and the magnet has a great impact on the particle cannon, but less on mechanical weapons, and we can complete the module replacement work in the asteroid belt.

At the same time, we have to make a shielding modification of the combat spacecraft, which will not be too difficult, all the parts are on the mothership.

Once all the remodeling work is complete, we can launch an attack on Europa. ”

"How long will it take?"

"In the absence of external influences, with robots working together, it can be completed in fifteen days." ……

All mechanics have once again received a new order: to build as many defensive base stations as possible on the asteroid ring, and to assist in modifying the modular equipment of the mech's weapons.

Lifting the automatic cannons into the machine repair spaceship, the soldiers of the entire Earth machine repair camp were all excited.

Now everyone in the entire fleet is in operation, the fighters from Earth have also been given the opportunity to work in space, and every mechanic is fully engaged in the transformation operation.

There were a few muffled sounds, and there was a slight vibration on the ground, and He Qiliao knew that the base of the cannon he had installed had been fixed.

patted the cannon in front of him with a height of three meters, and He Qiliao nodded with satisfaction.

Through the transformation, the asteroid equipped with the cannon was fixed in the direction of movement, the meteorites around it were shattered, and the direction of the cannon was fixed to point to the position outside the star ring, and the transformation of the asteroid ring became more and more perfect.

The transport fleet from Mars in the rear has also arrived, and the Great West Country has received the information transmitted back from the front line, and the heart of the entire country is hanging again.

The Great Western Kingdom is really ill-fated, and it is impossible to imagine that they have moved away from the earth, and they still can't get rid of the fate of encountering aliens, but this time, the Great Western Kingdom no longer intends to avoid it, and they want to control their own future in their own hands.

Piloting the mecha back to the mech-repairing spaceship, He Qiliao stretched his waist. Despite the help of high-tech equipment, everyone still felt very tired after a busy day.

It's time to go back and rest, the monkeys on the shift have been waiting impatiently.

Under the automatic guidance of the No. 6 mothership, the spacecraft slowly flew towards the open hatch, and in the line of sight, there seemed to be a black shadow flashing, He Qiliao was stunned for a moment: "Xiao Wang, it seems that there was something just now, have you seen it?" ”