1. Under normal circumstances, the external threats faced by the spacecraft mainly include:

Radiation, cosmic unknown rays, dangerous celestial radiation, dangerous celestial gravitation, threats of dangerous celestial activity such as exploding meteorites, meteors, weightlessness, hypergravity, microgravity environments, vacuum, low pressure or even loss of pressure, high and low temperatures in harsh cosmic environments, complex high and cold environments, hypoxia, abnormal energy, tidal ripples, disturbances or attacks, injuries from cosmic starry beasts, potential dangers of superbugs, superviruses in a cosmic vacuum, potential threat of attack by any known unknown organisms, The potential threat of bacterial superviruses on cosmic bodies, the dangers that any unknown factors may pose......

2. In general, the internal threats that need to be considered by the spacecraft are:

Noise, light radiation, radiation from personal handheld terminal equipment, radiation from small mechanical equipment, radiation from medium-sized mechanical equipment, radiation from large mechanical equipment, radiation from spacecraft operation (radiation protection regulations for spacecraft's own mechanical equipment), radiation from materials and equipment stored in spacecraft (need to comply with the "Unified Management Measures for Radioactive Substances, Equipment and Materials"), the danger of anchoring due to insufficient power or damage of spacecraft, the potential threat of failure of spacecraft protective equipment, and the potential threat of spacecraft material supply, The threat that can be posed by the mental high pressure of the crew, the danger that any unknown factors may pose......

3. On the definition and division method of the six-level protection level of the spacecraft - "Six-Star Protection":

Six-star 🌟 standard: Level 6 protection (super protection, unknown protection)

To the greatest extent possible, protective measures are taken. There are even times when a large part of the device's performance is sacrificed and sacrificed. In addition to 100% effective protection against conventional hazardous items, the protection of all unknown and potentially hazardous items that are considered possible is added to ensure that nothing goes wrong.

Five-Star 🌟 Standard: Level 5 Protection (Full Protection, Known Protection)

Focusing on the protection of personal safety may have a certain amount of sacrifice and sacrifice in the performance of machinery and equipment. In addition to the protection of all known dangerous items, certain effective protective measures have been taken for some important unknown dangerous items.

Four-star 🌟 standard: Level 4 protection (advanced protection, high-end protection)

It mainly provides effective protection for known dangerous items, and does not consider unknown dangerous items. On the basis of ensuring the integrity of the equipment, the safety protection level is maximized. However, the protective measures set must not affect the performance of the device.

Three-star 🌟 standard: Level 3 protection (conventional protection, ordinary protection)

Consider most of the common known hazards and protect against them. At the same time, on the premise of ensuring the safety of personnel to the greatest extent, the performance of the equipment can be considered to a certain extent. However, the average and maximum radiation limits of all radiation projects shall not exceed national and industry regulations.

Two-star 🌟 standard: Level 2 protection (simple protection, low-end protection)

In view of special circumstances, under specific time, geographical and environmental factors, after comprehensive consideration, only the most dangerous part of the project is effectively protected. Because of the limitations of the protection program, the ability to respond to unexpected events is poor.

One-star 🌟 standard: Level 1 protection (adaptive protection, self-owned structure protection, local protection)

Rely on the protection of the ship's own structure. Some simple protective measures may be set up in some parts (e.g. captain's room, etc.). The ability to respond to unexpected events is basically zero.

Among them......

4. On the definition and division method of the six-level speed level of the spacecraft - "Six-star speed"......

5. On the definition and division of the six-level armament level of the spacecraft - "Six-Star Armament"......

6. Definition and division method of six-level energy consumption level of spacecraft - "Six-star energy consumption"......

7. On the definition and division method of the sixth-level intelligence level of the spacecraft - "Six-Star Intelligence"......

VIII. Definition and Classification of Six-Level Detection Levels of Spacecraft -- "Six-Star Exploration"......

9. On the definition and division method of the six-stage load class of the spacecraft - "Six-star load......

10. On the definition and division method of the six-level comfort level of the spacecraft - "Six-Star Comfort"......

11. Definition and division method of the six-level environmental protection level of spacecraft - "Six-star Environmental Protection"......

I won't go into detail about these, and you can search the Internet for yourself when you go back......

Let's talk about the key points: 55. About the classification criteria of spacecraft classes:

Any one of the ship's factors meets the one-star standard. It can be called a one-star spaceship. The same goes for two-star, three-star, four-star, five-star, six-star; However, there are also high and low ships of each star standard. For example, one-star spacecraft can be divided into: one-star low-level spacecraft, one-star medium-class spacecraft, and one-star high-level spacecraft. The same goes for two-star, three-star, four-star, five-star, six-star;

The so-called one-star low-class spacecraft means that at least one of the nine factors of the spacecraft meets the one-star standard, but no more than three. The so-called one-star medium spacecraft means that at least four of the nine factors of the spacecraft meet the one-star standard, but no more than six. The so-called one-star low-class spacecraft means that at least seven of the nine factors of the spacecraft meet the one-star standard, but no more than nine. The same goes for two-star, three-star, four-star, five-star, six-star;

It is divided in detail as follows:

One-Star 🌟 Inferior Spacecraft: Any one of the nine factors of a spacecraft satisfies the one-star criterion, but no more than three.

One-Star 🌟 Medium Spacecraft: A spacecraft that satisfies the one-star criterion for any four of the nine factors, but no more than six.

One-Star 🌟 Advanced Spacecraft: Any seven of the nine factors of the spacecraft meet the one-star criterion, but no more than nine.

Two-star 🌟 low-class spacecraft: Any one of the nine factors of the spacecraft satisfies the two-star criterion, but no more than three.

Two-Star 🌟 Medium Spacecraft: Any four of the nine factors of the spacecraft meet the two-star criterion, but no more than six.

Two-Star 🌟 Advanced Spacecraft: Any seven of the nine factors of the spacecraft meet the two-star standard, but no more than nine.

Three-Star 🌟 Inferior Spacecraft: Any one of the nine factors of the spacecraft satisfies the three-star standard, but no more than three.

Three-Star 🌟 Medium Spacecraft: Any four of the nine factors of the spacecraft meet the three-star standard, but no more than six.

Three-Star 🌟 Advanced Spacecraft: Any seven of the nine factors of the spacecraft meet the three-star standard, but no more than nine.

Four-Star 🌟 Inferior Spacecraft: A spaceship that satisfies the four-star criterion for any of the nine factors, but no more than three.

Medium-Four-Star 🌟 Spaceship: Any four of the ship's nine factors meet the four-star criterion, but no more than six.

Four-Star 🌟 Advanced Spacecraft: Any seven of the nine factors of a spacecraft meet the four-star criterion, but no more than nine.

Five-Star 🌟 Inferior Spaceship: A spaceship that satisfies the five-star criterion for any of the nine factors, but no more than three.

Five-Star 🌟 Medium Spaceship: Any four of the ship's nine factors meet the five-star criterion, but no more than six.

Five-Star 🌟 Advanced Spacecraft: Any seven of the nine factors of a spacecraft meet the five-star criterion, but no more than nine.

Six-Star 🌟 Inferior Spacecraft: A spacecraft that satisfies the six-star criterion for any of the nine factors, but no more than three.

Six-Star 🌟 Medium Spacecraft: A spaceship that satisfies the six-star criterion for any four of the nine factors, but no more than six.

Six-Star 🌟 Advanced Spacecraft: Any seven of the nine factors of a spacecraft meet the six-star criterion, but no more than nine.