"Didi-Didi-"

Jiang Yicheng woke up from the folding bed in the rest cabin and habitually reached out to ring the alarm clock. She didn't take a picture of the nightstand she imagined, but she remembered that she was on an interstellar expedition on a spaceship twenty-seven light-years away from the solar system.

At this point, her spacecraft had detached from the Alcubelli curvature drive (1) and was undergoing an unpowered orbit around the destination planet's synchronous orbit.

The spacecraft is set to rotate around the central axis at high speed, using the centripetal force of rotation to simulate the 1G gravity to which humans are most adaptable (2). However, because the centripetal force is related to the radius of rotation, it can only simulate 1G gravity in a specific area, that is, the 1G gravity area is limited to the rest cabin, which is only enough for Jiang Yicheng to sleep peacefully.

She felt that she would never be able to adapt to the so-called interstellar voyage. But despite this, she has been eating the meal of interstellar voyage.

Before getting out of bed, Jiang Yicheng first said to the AI lieutenant of the spaceship: "Honey, stop simulating gravity." ”

She named her ship "Darling". It sounds a bit crooked, but for interstellar explorers, their ship is clearly more important than the object.

"The spacecraft's rotation brake is on, please be careful of inertial slipping." The AI lieutenant said respectfully to her.

Jiang Yicheng bought a full set of AI adjutant voice packs so that he could change one every day during the long interstellar voyage. Today's voice is the Sunshine Zhengtai version, and it is also a version that Jiang Yicheng prefers.

The so-called rotation braking is to adjust the angle of the injector on the outer shell of the spacecraft, and spray compressed gas in the opposite direction of the rotation to slow down the rotation of the spacecraft. This process lasted only a few seconds, and when the ship's rotation speed returned to zero, the cabin returned to a state of weightlessness.

Jiang Yicheng untied the restraint belt of the folding bed and grabbed the handrail on the bulkhead to keep himself from floating away. She adjusted her posture and lowered her legs to the side of the pod that was artificially designated as "ground", and then put her feet in her magnetic shoes.

In weightlessness, Star Voyagers were able to "walk" on metal ground with the help of magnetic shoes (3), but that doesn't mean people can completely leave simulated gravity.

Humans are creatures that evolved in a 1G gravity environment, and their muscles need to be stimulated by gravity. Living in weightlessness for long periods of time can lead to a disease called "astronaut muscle atrophy", and in severe cases, even lose the ability to live in 1G gravity. As a result, even children born in an asteroid belt in a low-gravity environment will spend several hours a day in a simulated 1G gravity environment. This is to prevent muscles and bones from becoming dependent on low gravity, which can lead to deformities in their skeletal development and inability to return to normal gravity.

However, for Jiang Yicheng, she sleeps in a simulated 1G gravity environment not to exercise, but simply because she likes the feeling of gravity.

But in interstellar travel, weightlessness is the norm.

Jiang Yicheng strapped his feet to his electromagnetic shoes and slid out of the rest cabin along the side called "ground" (3).

The interior of the spaceship is not large, like a bachelor apartment. Outside the rest compartment is the living module, which in turn connects the lavatory, the warehouse and the cockpit. Because there is no direction of gravity, the connection of the various cabins is also three-dimensional, and after leaving the rest cabin, there is no fixed "ground".

Jiang Yicheng floated to the bathroom and first "washed" a "bath" with a wind shower.

Arbitrary water use in weightlessness is risky. The hydrophilic nature of human skin makes it easy for water to stick to people, and the surface tension also makes it easier for water to gather on the surface of the human body. In the absence of gravity or acceleration simulating gravity, water is a very difficult thing to get rid of. Therefore, for interstellar explorers who fly small private spaceships, high-pressure air showers are usually installed, and air showers are used instead of water baths.

But there are also downsides, such as drying out the surface of the body. After Jiang Yicheng "washed" and "bathed", he rubbed a moisturizer with polymer as the main ingredient all over his body, and then sprayed some hair conditioner based on hydrophobic organic matter on his hair, which can make his hair style and appear more voluminous.

Then she looked at the bathroom mirror and slightly touched her face with cosmetics specially made in weightlessness.

Without gravity, it is difficult to remove floating particles from the air, so Starsailer cosmetics cannot be made with powdered substances. No loose powder, no eyebrow powder, no powdery eyeshadow...... Instead, a water-based setting spray and moisturizers in different colors – dark eyebrows and contouring, other shades of primer, eyeshadow and blush. The ingredients of the moisturizing balm are hydrophilic, and if you sweat, it is easy to get flowers. But for people who work in weightlessness, makeup is also stronger than dust formation after drying.

Fortunately, Jiang Yi has grown up to be a person, and there is no "goddess" baggage, so makeup is just a meaning, as long as the mind is there.

After tidying up his appearance and changing into protective clothing, Jiang Yicheng floated out of the lavatory and came to the cockpit of the spaceship, waking up the control panel of the spaceship.

From the footage transmitted back from the visible light camera outside the cabin, Jiang Yicheng glanced at the blue-purple planet below the synchronous orbit. It is a newly habitable planet that has just been discovered by a space telescope, and in addition to a large number in astronomy, it has been named "Blue Amber".

This name is a bit nice, but for Jiang Yicheng, it is a nightmare in front of him.

Jiang Yicheng turned on the cockpit's internal camera, looked at her current appearance from the display of the control panel, and after confirming that she looked like a human dog, she practiced her trademark smile again.

Ready to go live? Hardly.

After all, the content of her live broadcast is to survive alone for a week on the uninhabited planet below. Even if Blue Amber is a habitable planet, there is no guarantee that it will be truly safe.

But in order to make money, in order to pay off debts, and in order to restore her creditworthiness to normal, she must go live.

Through the miniature communication wormhole carried by the spacecraft, Jiang Yicheng is connected to the Internet of human civilization. boarded the live broadcast platform for 20 billion human beings and opened her "Habitable Planet Survival Live Broadcast" channel.

"Hello friends from Earth, Mars, Moon bases, and asteroid belts!" Jiang Yicheng smiled at the camera and said, "This is Yicheng's live-the-planet survival live." ”

"I've just woken up from the rest pod, and the ship has arrived at the location of this survival challenge, the newly discovered habitable planet 'Blue Amber'. Now that my ship is orbiting in a synchronous orbit of Blue Amber, let's take a look at this beautiful planet from space......"

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Exegesis:

(1) Alcubelli curvature drive: The principle is to bend the space outside the spacecraft, so that the space in front of it has a positive curvature (positive gravity) and a negative curvature (antigravity) in the space behind, so that the space where the spacecraft is located is pulled forward.

According to the calculations of Mexican physicist Miguel Alcubierre, this makes it possible to travel faster than light without violating the principle of maximum the speed of light. While anti-gravity is a difficult problem to solve, Alcubelli curvature drive is still a fairly popular way to travel faster than light in mainstream science fiction works such as Star Trek.

(It's worth noting, however, that the curvature drive in "The Three-Body Problem" is not based on Alcubelli's design)

(2) Simulate gravity with centripetal force: mg=mω^2r, which means angular velocity ω=√g/r.

(3) Sliding walking: According to the calculation formula of Lorentz force, it can be seen that there is a big difference between the attraction force of the magnet and gravity, and the gravity can be regarded as a fixed direction, and the magnet attraction is related to the magnetic flux. Magnetic shoes require more force to lift your foot, so gliding on the surface is the least effort-saving.