greek astronomy

These stories also added a cultural and historical dimension to astronomy. They made astronomy more accessible to the general public. People were more interested in the stars because of the exciting stories behind them. This led to more people observing the sky, which in turn contributed to the development of astronomy over time. Moreover, the Greek constellation stories were passed down through generations, and as a result, the knowledge of constellations was preserved and further studied.

The Department of Astronomical Affairs was the name of an ancient official office. Its function was to observe astronomy and calculate the calendar. Its name changed in different dynasties. For example, before the Sui Dynasty, it was called the Taishi Ling, Taishi Bureau, or Taishi Jian. In the Tang Dynasty, its name changed many times. In the Song and Yuan Dynasties, it was called the Department of Astronomical Affairs, the Department of Tiantai, or the Astronomical Academy. In the Ming and Qing Dynasties, it was called the Imperial Astronomical Administration. The Director of Celestials was the official in charge of the Heavenly Division. The Heaven Inspectorate had different meanings in different situations. In the settings related to the prison, the Nether Demons in the prison formed the Heaven Supervision Bureau to fight against the Ten Kings of Hell. It was formed by three directors, and under the directors were eight kings and sixty-four generals. It was protected by countless Nether Demons and was the most powerful force in the prison. It was responsible for the security of the prison, and there was also a security team called the Breaking Formation Camp formed by 500 Nether Demons. In the setting of the Yue Country in the Alien Continent, the Heaven Inspectorate was one of the five supreme organizations in the Yue Country. It was responsible for managing astronomical and geographical affairs, investigating strange and secret matters in the Yue Country, and its headquarters was set up in Jiang City. While waiting for the TV series, you can also click on the link below to read the classic original work of "Dafeng Nightwatchman"!

A telescope was an optical instrument used to observe, aim, and measure distant objects. Its angular magnification was generally greater than 1. In a broad sense, it also included astronomical instruments that observed electromagnetic waves invisible to the human eye. It was mostly used in ground observation, astronomical observation, astrophotography, space exploration, and other fields. In 1608, the Dutchman Hans Lieber made the world's first binoculars. In 1609, the first refraction telescope was made by Galilei, and the telescope began to be used in astronomy. An astronomical telescope was an astronomical observation device that collected celestial radiation and determined the direction of the radiation source. It usually referred to an astronomical optical telescope with light gathering and imaging functions. According to the principle of imaging, it could be divided into three categories: refraction telescope (using a lens to produce a mirror), reflection telescope (using a mirror to produce a mirror), and catadiopretic telescope (using both a lens and a mirror to produce a mirror). It was not recommended for beginners to buy expensive equipment at the beginning when choosing an astronomical telescope. For example, the price of the more affordable Singterra 80EQ (about 600 yuan) was more suitable for entry. Although it was cheap, it could shoot the three common planets, the moon, M42, and so on. When choosing two products with the same price but different brands and a difference of 1 - 200, the difference was not big for beginners. They could choose the one they liked more. There were many brands of astronomical telescopes, such as Star Terran, Meade, Cinda, Exploration Science, Boguan, etc. Among them, Star Terran was the best-selling. It was recommended to give priority to well-known brands and avoid unknown small brands to avoid stepping on the pit. The budget astronomical telescope worth buying in 2024 is the Celestron StarSense Explorer DX130AZ.(Price: $379.95, original price: $479.95, 5.1-inch large aperture, 650mm focal length, equipped with StarSense sky recognition technology, etc.), Orion Observer 90mm telescope (Price: $379.95, 90mm objective lens diameter, 86.4cm tube length, comes with two eyepieces), Sky-Watcher Classic 200 (Price: $550.00, original price: $655.00, equipped with 8-inch mirror and other advantages), Celestron 76mm Sign Series Firstscope (Price: $79.70), etc. The novel "Hundred Years of Spaceship" is equally exciting. Everyone is welcome to click and read it!

Based on context alone Astronomy was a science that studied celestial bodies and the universe. The following were some basic knowledge of astronomy: ** 1. Celestial Body Type ** 1. ** Stars ** - A star was a spherical glowing plasma celestial body condensed by gravity. The sun was the closest star to Earth. The star's interior produced energy through nuclear fusion reactions and radiated light and heat. For example, the fusion of hydrogen into helium released a huge amount of energy, maintaining the light and heat of the star. - Stars had different sizes, masses, and luminosity. Massive stars usually have high luminosity and short lifespans, while low-mass stars have low luminosity and long lifespans. 2. ** Planet ** - Planets were celestial bodies that orbited a star in an oval orbit, and they were so massive that they could rely on their own gravity to make their shape similar to a sphere. They could also clear other celestial bodies near their orbit. In the solar system, there were eight planets. They were Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune in descending order from the sun. - Planets could be divided into terrestrial planets (like Earth, which had a solid surface) and wood-like planets (like Jupiter, which was mainly made of gas). 3. ** Satellite * - A satellite was a celestial body that orbited a planet. Earth's satellite was the moon, which had an important influence on Earth's tidal phenomena. The size, shape, and composition of the satellites varied. Some satellites had a large number of craters on the surface, while others might have special geological activities. 4. ** Asteroid and comet ** - Asteroid was a celestial body in the solar system that was similar to planets orbiting the sun, but much smaller in size and mass than planets. They were mainly distributed in the asteroid belt between Mars and Jupiter. - Comets were small celestial bodies made of ice and dust. When they approached the sun, the ice would sublimate to form a comet's coma and tail. The comet's orbit was usually a very long oval. ** II. Observation Tools and Methods ** 1. ** Binoculars ** - An optical telescope was the most common type of telescope. It observed celestial bodies by collecting and focusing light. It could be divided into refraction telescope and reflection telescope. A refraction telescope uses a lens to reflect light, while a reflection telescope uses a mirror to reflect light. - Radio telescopes observed celestial bodies by receiving radio waves emitted by them. It was of great significance for the study of celestial bodies that were difficult to detect by optical observation, such as pulsar. 2. ** Astronomical Observation Location ** - The ideal astronomical observation site should be far away from urban light pollution, and the sky should be clear and cloudless. For example, some high-altitude, dry areas, such as the Atacama Desert in chile, were ideal locations for many large astronomical telescopes. ** 3. The structure of the universe ** 1. ** Solar System ** - The solar system was made up of the sun, planets, satellites, asteroids, comets, and other celestial bodies. The diameter of the solar system was about one light year, and the mass of the sun accounted for the vast majority of the total mass of the solar system. 2. ** Milky Way ** - The Milky Way was a spiral galaxy that contained hundreds of billions of stars. The solar system was located on a spiral arm of the Milky Way, and there might be a supermassive black hole at the center of the Milky Way. The diameter of the Milky Way was about 100,000 light years. 3. ** Galaxy clusters and superclusters ** - Multiple galaxies gathered together to form a galaxy cluster, and multiple galaxy clusters formed a supercluster. There were a large number of galaxy clusters and superclusters in the universe, and their distribution and structure were important for studying the evolution of the universe.