Astronomical Time Group | Explore the secrets of time sundial armillary sphere mechanical clock

**We look at the time and rest every day, do you know how "time" comes from? People divide time by observing the movement of the sun, so that after thousands of years of time, you can still use the world's oldest astronomical instrument to observe and look up at this sky from morning to night. Isn't it amazing! ** ★Professor Huang Qinfei of Normal University, Brain-STEAM brain wave research guidance and research and development ★Jointly recommended by more than 100 primary and secondary school teachers ★Selected as one of the top 100 domestic parent-child STEAM toys ★American STEM.org certification **【armillary sphere】** https://live.staticflickr.com/65535/51552774776_562ef681a0_h.jpg" Using wood with excellent hand feel, a small and lightweight version that is easy to carry is developed, and a number of historical books are assembled to completely reproduce the armillary sphere with the triple wheel combination of Liuhe Instrument (outer), Sanchen Instrument (middle), and Siyou Instrument (inner). Through the assembly process, not only can we cross the historical gap, so as to understand the ingenious mechanism of the ancients in making the armillary sphere, and we can actually observe the stars and experience the joy of exploring astronomy. ｜A little knowledge of the armillary sphere｜ Zhang Heng's armillary sphere is based on the "Huntian theory" he advocated, and it was made by improving the design of Geng Shouchang in the Western Han Dynasty. The "Huntian theory" believes that the celestial body is like an egg ball, and the sky is equivalent to an egg shell, and the earth is like an egg yolk. "Can the armillary sphere really observe celestial phenomena?" In Zhang Heng's time, people also asked the same question. In order to prove that the armillary sphere can observe celestial phenomena, he conducted tests indoors. According to the astronomical orientation displayed by the armillary sphere, he accurately stated the position of the stars, which was consistent with the astronomical phenomena observed outdoors, and also convinced everyone that the armillary sphere could accurately measure celestial phenomena. ! ➤ Product Details Difficulty level: ★★★★ (the highest five-star) Assembly time: about 1.5~2 hours Recommended age: 6 years and older Attached to the package: graphic assembly instructions Product size: 12cm*12cm*18cm Package size: 25.5cm*14.5cm*3cm Material: birch Origin: Taiwan **【Sun God Sundial】** https://live.staticflickr.com/65535/51553009763_1461980b27_h.jpg Through the process of assembling the sundial, integrating the astronomical theories taught in school textbooks, establishing the basic concepts of time, the sun and the earth, and understanding how the ancients observed the sun's trajectory across the sky, dividing the concept of time, and inspiring children's understanding of astronomy and science. Sensitivity and interest. At the same time, we are different from most sundial imported from abroad, which can only be observed in the country of origin. The sundial of the sun god can actually adjust the latitude, distinguish winter and summer scales, so that children can observe the time difference in different seasons, which latitude/country they are in. can be used! ｜Sundial Tips｜ According to current archaeological records, the oldest sundials are the ancient Egyptian obelisk from 3,500 BC and the Babylonian shadow clock from 1,500 BC. In a broad sense, a sundial is a device that uses the height or orientation of the sun to display time. In modern times, in addition to its time-observing function, a sundial is often used as a learning aid for installation art and mathematics. ➤ Product Details Difficulty level: ★★☆ (the highest five-star) Assembly time: about 15~30 minutes Recommended age: 6 years and older Attached to the package: graphic assembly instructions Product size: 15cm*15cm*18.5cm Package size: 18.5cm*15.5cm*1.5cm Material: non-toxic birch Origin: Taiwan **【Swing mechanical clock】** https://live.staticflickr.com/65535/51552639826_e38e96758a_h.jpg The Italian missionary Matteo Ricci paid tribute to the pendulum mechanical clock and presented this Western imported product together with the scientific research results. We simplify the principle of the ancient pendulum rod, insist on not using electricity, and use the combination of pendulum length, gears and weights. Children can try different combinations of the three during the assembly process to easily understand the mechanism principle of the mechanical clock, the principle of the pendulum rod, and the gears. , Escapement system design, can even admire the greatness of the ancients' invention of timing tools, stimulate scientific sensitivity and interest, and is an excellent opportunity to practice and learn! ｜Little knowledge of escapement system｜ In the world of watches and clocks, it is often mentioned what is the "escapement"? The escapement was first invented by Philo of Byzantium, Greece, but the escapement used in the clock mechanism was developed by Thich Nhat Hanh, a monk in the Tang Dynasty and a court astronomer, mathematician, and engineer. "Escapement" is literally understood, which means "one retraction and one release", and through this retraction and release mechanism, the power can be collected first, and then other parts can be used to adjust the power, so that the movement can maintain smooth operation. The accuracy of the second hand can run in an orderly manner, and the quality of the escapement will affect the accuracy of the mechanical watch! ➤ Product Details Difficulty level: ★★★☆ (the highest five-star) Assembly time: about 2~2.5 hours Recommended age: 6 years and older Included in the package: graphic assembly instructions, painting pigments + watercolor pens Product size: 22cm*9.5cm*28cm (without pendulum) Packing size: 30cm*23cm*3.5cm Material: non-toxic birch Origin: Taiwan https://live.staticflickr.com/65535/51376178085_f04ecc5997_h.jpg ➤ Precautions Please use the attached sandpaper to polish the wooden parts before assembling, and pay attention to the small parts, please be careful not to swallow them. There is no need to use glue, just follow the instructions to install the parts in the correct orientation and clips, and confirm the assembly tightness of the parts to ensure that the model can be used normally after assembly. If you have missing parts or other assembly questions, please contact the Design Gallery. The design hall enjoys a seven-day appreciation period. The appreciation period is not equal to the assembly trial. If there is assembly, it will affect your return and exchange rights. Please keep the outer packaging intact when returning the product, and please return the related gifts and contents together. If there is any damage or assembly, returns will not be accepted. **▲ There are additional discounts for large-scale purchases by educational institutions. Click "Contact Design Museum", and someone will contact you.**