Astronomical observation has been a crucial activity since its inception in 1608. The primary means of observing celestial bodies is the astronomical telescope. It is a tool that has revolutionized our understanding of the universe.

Astronomical observation not only helps us comprehend the physical properties of the universe but also reveals the evolution history of the universe. It is one of the essential means for human beings to explore and study the universe.

There are two main ways of astronomical observation: ground observation and space observation. Ground-based observations require favorable weather conditions and an environment with less light pollution.

On the other hand, space observations require advanced technology and specialized equipment. Ground-based observations can be done with telescopes that use visible light, radio waves, and other forms of electromagnetic radiation.

The telescope is the primary tool for observing celestial bodies and capturing celestial body information. The invention and development of the telescope have been critical to the advancement of modern astronomy.

With the continuous improvement and enhancement of telescope performance in all aspects, astronomy is making a huge leap, rapidly advancing our understanding of the universe.

The telescope was invented by a Dutch optician in 1608 who discovered that two lenses could see distant objects. Inspired by this discovery, he built the first telescope in human history. In 1609, the astronomer Galileo built a refracting telescope with a diameter of 4.2 cm and a length of about 1.2 meters. This telescope brought astronomy into the age of the telescope.

Since Galileo made the first telescope in 1609, it has undergone continuous development. Telescopes have been developed from the optical band to the full band, from the ground to space.

As a result, the observation capabilities of telescopes have become more powerful, enabling us to capture more and more celestial body information. Today, we have telescopes in the electromagnetic band, neutrinos, gravitational waves, and cosmic rays.

There are many types of telescopes, such as refracting telescopes, reflecting telescopes, array telescopes, and more. Each type of telescope has its unique advantages and disadvantages and can be used to observe different kinds of celestial objects.

Radio telescopes are used to observe radio waves in the sky. Radio waves have extremely long wavelengths compared with visible light wavelengths, and can pass through clouds and the atmosphere, allowing for observation of many different kinds of celestial objects.

There are many types of radio telescopes, including single-antenna telescopes and array telescopes, which can be used to observe galaxies, and nebulae, and study the structure and motion inside the Milky Way.

In addition to radio waves, we can also use X-ray telescopes to observe celestial objects. X-rays are high-energy electromagnetic waves that can penetrate ordinary matter and be absorbed by celestial matter.

As a result, X-ray telescopes can observe some celestial bodies that cannot be observed by conventional telescopes, such as black holes and neutron stars.

Astronomical observation is one of the most important means for human beings to explore the universe.

Through the use of various advanced observation equipment and data analysis techniques, we can better understand the nature and evolution history of the universe, and provide an important scientific basis for human beings to explore the future of the universe.

As technology continues to advance, the possibilities of astronomical observation will continue to expand, allowing us to explore the universe more thoroughly and deeply than ever before.