Chapter 84 Return ([-])

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It was around five o'clock in the afternoon of Mars time, and the Planetary Discovery rover was following an elliptical orbit, moving to a position [-] earth kilometers away from the equator in the northern hemisphere.

Tasia reported the news of Gliese's rescue. According to the position of Mount Olympus and the estimated take-off time of the spacecraft, the mothership adjusted the elliptical orbit, and the perigee was adjusted to be 240 kilometers above the Martian equator.

According to this setting, when they left Mount Olympus, the mothership was approaching the equator 240 kilometers away from Mars along an elliptical orbit.

The capsule spacecraft can return to the mothership in the shortest time. Everyone can't wait to go back, take a good hot bath, lie on the big bed of water fluid, and relax every overworked muscle.

In the golden glow of the orange-red sunset, the two spaceships flew towards the mothership according to the two accelerations of gravity.

About half an Earth hour later, they returned to the mothership.

As soon as the spaceship entered the mooring layer of the mothership, Caroline's sweet voice came over, "The captain said, everyone has worked hard, take a good rest tonight, and arrange a 'Welcome the Return of the Discoverer' ceremony for everyone tomorrow morning, and mourn Vander."

When traveling between stars, there is an operation called "gravity well orbit change ejection".

That's right, every celestial body in the universe has a gravitational field.

Compared to other celestial bodies in the solar system, the sun is very huge.

Therefore, the corresponding gravity well around it will appear deeper and extend farther.

In contrast, the gravity wells of asteroids and small moons are described as very shallow.

Everything on the surface of a planet or Mars is thought to be at the bottom of a celestial gravity well.

A spacecraft is in orbit around Mars. If it intends to leave the solar system, besides directly accelerating away from Mars, there is a more energy-saving way——gravity well ejection.

After the mothership reaches perigee, turn off the power system.

At this time, the mothership will freely fall towards the surface of Mars with the gravitational acceleration of Mars (3.72 m/s^2).

During this approaching process, the potential energy of the spaceship is constantly decreasing and the kinetic energy is constantly increasing.

That is to say, the speed of movement is getting faster and faster. If the spacecraft does not move further, it will fall to the surface of Mars after six earth hours, smashing a big crater there like a meteorite.

However, when the spacecraft is constantly approaching the surface of Mars and gaining a lot of kinetic energy (acceleration), as long as it accelerates at a certain position, it will pass by Mars.

Like a gravitational slingshot, it is thrown out along an arc.

The setting of this position has something to do with the flight direction of the spacecraft leaving the solar system and going to Noyt.

Nord is in the cockpit on the eighth floor, sitting in the co-pilot position of the accelerator recliner, and Carl is in the driver's seat.

"Caroline, inform the crew to enter the hydraulic bed. Also, make sure Yun Qi also enters!"

"Yes, Captain."

"Carl, according to the reference coordinates of South Gate [-], West Point [-] and Skyship [-], we will go to the shortcut entrance first, and calculate the ejection position of the gravity well according to the shortcut entrance coordinates. When leaving Mars, open the shield, there are asteroids there bring."

To navigate in the interstellar space, it is necessary to use star clusters as reference coordinates, establish a three-dimensional coordinate system, set the target location, and calculate the ballistic route.

Any deviation in the angle will lead to a difference of hundreds of thousands of miles in the result.

This is the universe, made up of countless galaxies.

Just the Milky Way -- that's an elliptical barred rotating galaxy 20 light-years across.

Well, one light-year is about nine trillion kilometers, and 20 light-years is already an unimaginable distance for human beings on the earth.

Of course, the ballistic route will be calculated and corrected in real time according to the target position parameters at any time.

The spacecraft is in the process of falling rapidly, and it is in free fall with the acceleration of Mars gravity, and everything on the ship enters a state of weightlessness.

Nord reclined in the accelerator seat and fastened his seat belt.

The fan-shaped porthole is already on the back of the fiery red planet, and there is darkness in front of him. Nord closed his eyes, feeling the discomfort caused by weightlessness.

Usually when falling, the human body is in a state of weightlessness, and the otoliths in the vestibular organ no longer contact the surrounding nerve cells due to weightlessness and transmit signals to the central nervous system, thus losing the orientation function.

The vestibular organ is closely related to the autonomic nervous system in charge of breathing, digestion, circulation, excretion, sweating and other functions.

Therefore, once the vestibular organ fails to function and the normal interaction between the internal organs of the body disappears, it will cause symptoms such as dizziness, nausea, and vomiting in humans.

The ejection trajectory has been set, and the rest is just waiting.
Nord's eyes flicked to the radar screen in the cockpit from time to time.

Two sets of coordinates are displayed on it, one is used for traveling between galaxies, and it is a three-dimensional reference coordinate system established by the three star clusters of Nanmen [-], Xijiao [-] and Skyship [-] commonly used by the Noiters.

In this set of reference coordinate system classes, the position of the shortcut entrance, the position of Noyte planet, the coordinates of the solar system, the coordinates of the passing star system and the coordinate position of the current spacecraft are marked.

Another set of coordinates shows the current Martian time, and according to the solar system standard, two coordinates of their position are marked-the exact position of the spacecraft, and their speed and distance from Mars are displayed next to it.

Caroline's elegant voice came from the mothership's PA system, "Attention everyone, fasten your seat belts, we are about to enter six accelerations of gravity—a five-second countdown!"

"Four seconds."

"Three seconds."

"Two seconds."

"one second"

Nord stared closely at the coordinates of the spaceship, well, the trajectory is perfect, and they are about to enter the ejection point.

In an instant, the power system of the spaceship started, and the huge propulsion forced Nod firmly on the acceleration couch.

At this moment, the spacecraft skimmed the surface of Mars at an extremely fast speed, was thrown out by the gravity of Mars, and entered the predetermined orbit.

The spacecraft will move in a straight line at a constant speed along the predetermined orbit at a speed of [-] earth kilometers per second.

This speed has far exceeded the third cosmic speed.

The third cosmic speed refers to the minimum launch speed needed to fly out of the solar system and roam in the vast galaxy, [-] kilometers per second.

Suddenly, the acceleration disappears and the powertrain can rest again.

Caroline's voice came from the broadcasting system, "Attention everyone, successfully entered the predetermined track, and the warning has been lifted."

Nord unbuckled his seat belt and floated to the rest cabin on the seventh floor.

Floating into the master bedroom, he looked over to the small soft bed, Yun Qi was lying motionless on the bed, his face was blue, and he had already passed out.

With a smug smile on her face, Nord unbuckled her seat belt and hugged her horizontally, "Honey, do you still want to learn how to fly a spaceship?"

In a weightless environment, he doesn't like to tie himself to a big bed, but prefers to float in the air and sleep wherever he goes. Now that someone is with him, he kisses her forehead and holds her in his arms Here, sleep together.

(End of this chapter)

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