Material: Sky iron, meteorite iron

Size: Approx. 11cm

Narrative:

Celestial iron, also known as meteorite iron or meteorite iron, is named because it comes from outer space. It is a mysterious and rare substance that is given extremely high cultural and scientific value by people. The following is a detailed description of the origin and composition of Tiantie:

**The Origin of Skytrain**

The formation of celestial iron comes from the process of meteorites from the universe hitting the earth. Meteorites are fragments of celestial bodies from space. Some of them contain a large amount of metal components. When they enter the Earth's atmosphere, they are melted by high temperatures and impacted by air currents, and fall to the ground to form astronomical iron. The following is its main background:

1. Origin of the Universe

Meteorites are remnants of comets, planets, or interstellar dust that date back to the early days of the Solar System. These materials are broken into fragments by interstellar collisions and gravity, some of which enter the Earth's gravitational field.

2. Landing on Earth

When a meteorite enters the Earth's atmosphere, the friction generates extremely high temperatures, causing the outer layer of the meteorite to melt. However, the core of a meteorite containing metallic components may remain intact and impact the surface in a molten or semi-molten state, forming astronomical iron.

3. **Special meteorite event**

Famous meteorite events in history, such as the Campo del Cielo meteorite in the United States and the metal meteorites in Antarctica, have left behind a large amount of astronomical iron, providing valuable materials for the study of astronomy and geology.

**Composition of iron**

The main components of iron are metals, especially iron (Fe) and nickel (Ni), in addition to other trace elements and specific structural characteristics:

1. **Ratio of Iron to Nickel**

- **Iron**: Sky iron usually contains a high proportion of metallic iron (more than 90%), which is hard and highly resistant to corrosion.

- **Nickel**: Nickel is a minor component in meteorites, usually accounting for 5-10% of the metal part of meteorites, and has the effect of improving the toughness of the material.

2. Trace elements

Sky iron also contains small amounts of cobalt (Co), chromium (Cr), phosphorus (P) and sulfur (S), which make the structure of sky iron more stable and give it a unique luster.

3. Crystal structure

The metal structure inside the sky is often a Widmanstätten pattern, a unique geometric crystal arrangement that can only form in the extremely cold and slowly cooling environment of the universe. This structure makes the sky iron present beautiful silver-white lines after cutting and polishing.

**The symbol and purpose of Skytrain**

Because of its uniqueness from the universe, Tiantie has profound cultural and scientific value:

1. **Religious and cultural symbols**

- In some cultures, iron is considered a sacred substance, representing good fortune from heaven, and is often used to make amulets, ritual implements, or sacrificial items.

- For example, in the Chinese Taoist tradition, iron from the sky is used to forge certain swords or magical instruments, believed to ward off evil and ward off disasters.

2. Scientific research

Astronomical iron is an important material for studying the origin of the universe and the evolution of planets. By analyzing the composition and structure of astronomical iron, scientists can understand the physical and chemical processes of the formation of the early solar system.

3. Art and Collection

Due to its Weissmann crystal structure and rarity, celestial iron is often made into jewelry or ornaments, becoming a precious object sought after by collectors.

**summary**

With its mysterious cosmic origin and special metal structure, Tiantie has become a rare material that combines scientific, cultural and artistic values. It not only reminds people of the beauty and mystery of exploring the universe, but also demonstrates the profound imprint of the interconnection between the earth and outer space.