Six Hundred and Thirty Ninth Indiscriminate Bombing

Thousands of missiles rushed out from the human warships, dragging faint trails and scrambling towards Europa.

The overwhelming missiles are like a swarm of flies flying towards the delicious cake. No one dares to doubt their role. At this moment, even the aliens feel desperate, and some alien warships have escaped from Europa. .

There was no need for the expedition fleet to approach Zero Jupiter anymore. Gao Kai immediately ordered the fleet to adjust its orbit. The fleet turned a corner less than 30,000 kilometers away from Jupiter Zero and gradually left Jupiter Zero.

At the same time, the alien fleets on Europa, Ganymede, Callisto, and several other satellites that are closer to Jupiter all took off and attacked the expedition fleet fiercely from all directions, but the nearest one was still Ganymede. Six fleets.

"Commander, the observation team reports that the speed of the enemy army has suddenly increased, double the previous highest speed!"

A smile appeared on Gao Kai's face: "I just thought of speeding up now? It's too late!"

He guessed in his heart that the aliens probably wanted to replicate the last tactic, using Jupiter as a bait to encircle the Second Fleet near Jupiter. Unfortunately, they did not expect that the main weapon of the Second Fleet was cannons, not Missiles that are easier to intercept.

The expeditionary fleet quickly left, but the battle around Io did not stop. First, thousands of nuclear bombs hit the surface of Io layer by layer. The rising mushroom cloud has not dissipated, and a new mushroom cloud rises At the same time, two shells even fell to the same position, and there was a wonderful scene of a mushroom cloud within a mushroom cloud.

The side of Jupiter Zero facing the expedition fleet was almost covered by the nuclear explosion. The ice and snow melted and evaporated, the sand and rocks were melted and vitrified, and everything in sight was completely wiped out in the nuclear explosion.

Seeing all this, everyone was relieved, but for some reason, no one cheered for it.

Although the expedition fleet destroyed Jupiter, the alien fleet is still there. Now the Second Fleet has exhausted all its ammunition reserves. Only the dozens of fighter jets are still capable of fighting, and they have no ability to destroy the alien fleet.

Needless to say, everyone knows in their hearts that as long as the alien fleet exists for one day, it will be the enemy of human survival.

All the shells fell on Jupiter, and it took a little time for the missiles to arrive, and the battlefield fell into a brief stagnation.

Ye Han in the headquarters looked at Gao Kai curiously: "This is the end? What about the back?"

Although he went to the headquarters early in the morning to watch the excitement, he knew his identity very well, and he kept silent during the battle, and he would not speak until the battle came to an end.

"The back?" Gao Kai smiled mysteriously, "You'll know it when you look at it."

Ye Han looked suspiciously at the screen. The shells were used up, and only the missiles were left to fly towards Io. Could it be that the missiles could circle around the back of Io?

The missile group finally arrived at Jupiter Zero, and the alien fleet still sticking to the home planet struggled to intercept them. Their efforts did achieve certain results, but they couldn't stop all the missiles.

In the past, the aliens could still rely on the anti-aircraft firepower on the ground for a period of time, but the ground has now been leveled by a large number of nuclear bombs, and they can only watch the missiles fall into Zero.

Like a meteor shower.

A rain of death.

Ye Han glanced at Gao Kai in surprise. The missile just fell into Ion Zero. How is it different from a cannonball?

Gao Kai also gave Ye Han a confident look, and Ye Han turned his gaze back to the screen, just in time to see a mushroom cloud rising above Europa.

The air explosion, instead of the ground explosion of the shell, was the only difference Ye Han found.

Gao Kai let out a long breath: "It's done!"

Many people including Ye Han were puzzled, what happened?

Only a few senior executives of the fleet showed joyful smiles, which made everyone even more puzzled.

"We used cobalt bombs..."

The knowledgeable ones suddenly realized, but the vast majority of people still didn't understand, including Ye Han.

Upon seeing this, Gao Kai continued to explain: "The cobalt bomb is actually a kind of neutron bomb. To put it simply, it is to add a layer of cobalt 59 shell on the outside of the neutron bomb." By bombarding the cobalt layer with electrons, ordinary cobalt can be turned into the radioactive element cobalt-60, which can release high-energy gamma rays when it decays, do you understand?"

Now most people understand.

Most people have never touched or even heard of cobalt 60, but it has a wide range of applications, and it can be used in breeding, flaw detection, disinfection and radiotherapy.

Because of its wide application, there have been many casualties caused by cobalt-60 radioactive sources, such as picking up a shiny little thing on the road and bringing it home, but the whole family almost died. (One more thing, it is said that most radioactive sources are made into chains or pendants. If you encounter unknown metals in the wild, especially small pieces of unknown metals, don’t take them home.)

The principle of the cobalt bomb is also very simple. The air explosion of the nuclear bomb produces a large amount of cobalt-60. After entering the atmosphere, this thing continues to decay and produces continuous gamma rays to irradiate Jupiter. Even if the cobalt-60 dust falls to the ground, the irradiation will not stop.

What are gamma rays? It is a powerful ray produced in large quantities when a supernova explodes, and it is a high-risk ray that can kill all living things!

The diffusion of cobalt-60 is definitely not comparable to a supernova explosion, but the damage caused by gamma rays is not much different. Even if the aliens do not die, they have to hide underground and be honest local mice.

Although he understood the meaning of the cobalt bomb, Ye Han still couldn't let it go, and asked worriedly: "Aliens flew in from outside the solar system. The most important thing in the interstellar space is radiation. They have a way to fly through the interstellar space. Is it possible that they can fly over the interstellar space?" Can't deal with cobalt-60 radiation?"

"It's okay, there's still the Sea of ​​Clouds." Gao Kai said with a bit of disappointment.

Sea of ​​Clouds...

Everyone was startled and turned their gazes to the screen.

Tens of thousands of kilometers away, Yunhai's indomitable figure has already broken through the blockade of the alien fleet, rushing towards Europa with countless thin lights.

The alien fleet desperately intercepted it, and even launched a fleet to crash into the Yunhai.

The unmanned Yunhai had no way to hide or dodge. It was hit by three alien battleships in succession, and the attitude of the battleship changed irreversibly.

But the deformed Sea of ​​Clouds is still intact, even if countless shards of light cut off countless fragments from its body, it still can't stop it from rushing towards Io, but only bumped into the sea of ​​clouds' route.

It wasn't until before it fell into the atmosphere that the alien fleet tried its best to cut the Yunhai into two pieces. The first half of the Yunhai fell into the atmosphere and continued to fall to the ground. Objects, including artillery shells and missiles that were not launched in time, as well as various unknown objects such as armor on the ship and internal equipment, and even a reactor fell out.