The military doctor injected Zhang Chao with a hibernating agent, and then gave himself an injection. The landing craft became completely quiet, leaving only Ye Han, who was frowning and thinking.
The alien fleet might arrive at any time. Ye Han did not dare to stay on the asteroid, so he immediately increased the engine power. The landing craft successfully flew away from the asteroid with weak gravity without any effort.
The direction of flight is not chosen casually. There is not much fuel on board. If the take-off direction is wrong, the relative speed between the landing craft and Jupiter will be reduced, and the opportunity to fly away from Jupiter will be lost. The orbiting direction of the satellite must be determined.
Make sure the route after takeoff is correct.
The best way to determine the direction is to observe nearby celestial bodies. Jupiter itself is very clear, but the satellites near Jupiter are much worse. No matter how good your eyesight is, it is impossible to see the celestial bodies near Jupiter clearly without optical equipment.
And you can’t stay in this ghost place for too long, otherwise you run the risk of being captured by aliens.
However, Ye Han knew that the relative speed of Yuewan when it collided with the small celestial body was not high, and the angle was also very small. By observing the impact traces left by Yuewan on the small celestial body, Ye Han roughly determined the direction of Yuewan before the impact.
This can indirectly determine the approximate flight direction of the small celestial body.
After the landing craft took off, Ye Han took one last look at the broken Yuewan. He silently raised his right hand to bid farewell to the battleship and his fallen comrades. He pushed the joystick forward and the landing craft quickly flew away. The black paint was quickly removed.
After blending into the sky, Ye Han could no longer clearly see the small celestial body that left behind the Yuewan.
He couldn't tell what he was feeling in his heart. He was grateful to have escaped and ascended to heaven, but he was also worried about his future destiny, and he also felt indescribable loss and confusion.
Ye Han could be considered to have received systematic training in astronomy, but it was only when he came to use the books that he learned less. Although the landing craft took off successfully and there should be no problem with the direction, he just couldn't figure it out and always felt that something was wrong.
Spaceflight is not a child's play. A slight mistake can lead to thousands of miles. As long as he makes a slight mistake, everyone, including himself, will be ruined on Jupiter, hundreds of millions of kilometers away from the earth.
How can I find out the route?
Ye Han didn't know much about what was outside the solar system, but he had a fairly good understanding of the situation inside the solar system. Since he had no clue, he could only use the stupidest method to list out what he knew first.
First of all, the flight direction of the landing craft should be retrograde around Jupiter, which is the same direction as the Moon Bay when it cut into the route around Jupiter. However, the Moon Bay flew more than half a circle around Jupiter before encountering Jupiter, so the battleship collided with the asteroid.
At that time, the sun should be somewhere directly in front of you.
With the orbital height of Europa, there should be no small retrograde celestial bodies nearby, but there is no need to worry about this issue. Only the devil knows what aliens did on Jupiter.
Secondly, he was unconscious for a period of time, and he didn't know how long he was unconscious. At this time, the sun could not be seen directly in front of the landing craft, and the situation on the left, right, and rear could not be clearly seen. He could only temporarily maintain the current route and wait until he was found.
Let’s talk about the sun!
He still didn't understand the orbit of the small celestial body. In order to ensure the correct route, Ye Han pointed the laser rangefinder on the boat at Jupiter and always paid attention to the distance between the landing craft and Jupiter.
Again, Ye Han knew very well the position of the expedition fleet when it set off. The earth should still be where it was at the moment, but he couldn't figure out the current posture of the landing craft. As long as the landing craft rolled 180 degrees, the original left position would change.
Right, causing a misjudgment and flying in the wrong direction... At this moment, he saw the Big Dipper outside the porthole!
A flash of lightning suddenly flashed across Ye Han's mind.
No, although it is far away from Jupiter, the constellations on the celestial sphere are still the same. You can completely judge the direction through the constellations. Even if it is not so accurate, it will not affect anything!
Ye Han immediately lay down on the porthole and looked around for the position of the sun.
The sun seen from the orbit of Jupiter was very small, but it was not confused with the stars in the sky. Ye Han quickly discovered traces of the sun in the side and rear direction.
At this time, turning around and flying towards the sun is seeking death. It may run out of fuel before flying out of Jupiter's gravitational range. You must maintain your course, fly more than half a circle around Jupiter, and then accelerate away.
Only in this way can limited fuel be used to return to Earth.
However, it is easier said than done. Once the spacecraft sets off, Ye Han has to inject himself with hibernating hormone. He only knows the general direction and does not have detailed orbital data. He may not know where it will fly by then. This is no joke.
Moreover, Jupiter is already the territory of aliens. Even if the landing craft is relatively far away from Jupiter at this time, there is still the possibility of encountering alien spacecraft.
Ye Han did not dare to continue thinking about it, fearing that he would be completely desperate if he continued to think about it, so he quickly pointed the laser outside the cabin at the earth: "Landing craft 104 calls the command center. I am Ye Han, the commander of the Marine Corps Yuewan. Currently, the Yuewan is
All surviving officers and soldiers are on the landing craft. The location, trajectory and speed of the landing craft are unknown. We urgently need the command center to guide us back..."
Worried that the landing craft would encounter an alien spacecraft, no one would know what happened to the expedition fleet. Ye Han told everything he knew about the situation, trying his best to let the command center understand the strength of the alien fleet. The chaotic news followed
The laser signal flies towards the earth at a speed of 300,000 kilometers per second.
More than forty minutes later, Earth, Qiongzhou Space Command Center.
"Report, Chief, we just received a signal from the expedition fleet!"
Huo Qiang's eyes widened in surprise: "Where did you say the signal came from?" There has been no news from the expedition fleet for most of the day. The space telescope on the Tiangong has confirmed the news that the entire expedition fleet was annihilated. How come another signal from the expedition suddenly appeared?
Fleet signal?
"Expeditionary fleet!" the communications officer replied with unusual certainty.
"What content?"
"There are a dozen survivors on a landing craft, requesting navigation from the command center."
"Go and do it immediately and do our best to bring our hero back."
"yes!"
"Notify Tiangong that I want an image of Jupiter, mark the signal source for me, and give me the analysis results as quickly as possible."
The picture on the big screen immediately changed to Jupiter, and a small light spot was marked near Jupiter.
After a while, the combat staff rushed to Huo Qiang and said, "The report and analysis results are out!"
"Pick the key points."
"Yes!" the combat staff officer said at a glance, "According to the analysis of known data, the warship lost control when the Yuewan broke out and hit a small celestial body near Jupiter. Due to the limited angle, the space telescope could not capture the details of the impact. The landing craft
The news said that the impact angle and relative speed of the Yuewan were not large, and they were survivors of the impact, including the injured."
"I didn't expect that!" Huo Qiang sighed, "Send the data as soon as possible!"
Soon after, Ye Han received a laser communication from the space station. After activating the remote control mode of the landing craft as required, Ye Han injected himself with hibernating hormone.
After another day and a half, the landing craft accelerated away from Jupiter's gravity and flew towards the earth and the sun.
