Introduction to the Galileo refracting telescope and the Newtonian reflecting telescope

The first telescope had a design consisting of a diverging eyepiece aligned coaxially with a converging objective lens, which was the invention idea of a telescope manufacturer. Dutchman Hans Lippershey in 1608, this design helped us observe an object magnified several times.

One year later, in 1609, Galileo improved this design to increase magnification and apply it to astronomy. This is considered the first time humans pointed a telescope at the sky. He was able to clearly see mountains and craters on the Moon and the Milky Way, he also discovered sunspots on the Sun, Jupiter and its famous satellites, this was also the first The person who discovered planets other than Earth also has its own famous satellites. And Isaac Newton is considered the first person to create a reflecting telescope in 1668. With the idea of eliminating chromatic aberration for telescopes, he thought of building a telescope that did not use lenses, and then the first reflecting telescope was born.

Modern models of telescopes.

- Hubble Space Telescope: Hubble is a NASA space telescope, launched into space on April 24, 1990. Hubble was not the world's first space telescope, but it was the largest and most powerful telescope ever launched until the recent launch of the James Webb telescope (December 2014). 2021). Hubble is named after American astronomer Edwin Powell Hubble (1889-1953). This is a reflecting telescope equipped with a computer system and a light-collecting mirror with a diameter of 2.4 meters. It is launched and operates in Earth's orbit at an altitude of about 610 km, about 220 km higher than the orbital altitude of the international space station ISS. Hubble can rotate once around the Earth in time. 97 minutes and 15 times per day. Hubble really surprised scientists when it could receive light from objects 12 billion light years away.

- Thirty Meter Telescope: The world's largest 30-meter diameter telescope - Thirty Meter Telescope (TMT) is located at the Mauna Kea volcano in Hawaii. Here, large-scale projects are led by a team of engineers, scientists and experts from Pasadena, California, who work together to develop optical telescopes. the most advanced and powerful learning in the world.

- TMT serves as a tool to investigate a variety of topics related to the solar system including: exploration of deep space in the universe; structure of major planets, providing detailed spectroscopic analysis of galaxies and cosmic debris during the galactic era; track giant black holes, and look at planet formation and the properties of extrasolar planets.

CDK600 Large Telescope

PlaneWave CDK600 telescope has a mirror diameter of 600mm and a focal length of 3962mm. This is a revolutionary telescope system with Corrector lens specifically designed to eliminate coma and off-axis astigmatism, the telescope has a flat field up to 70mm wide, suitable for astrophotography. In addition, the telescope system is equipped with an L-600 base installed according to the Azimuth-Altitude horizon coordinate system, helping the Telescope system operate stably, capable of orientation with an accuracy of up to 2 arcsec and the ability to The tracking ability only fluctuates by about 0.3 arcsec in 5 minutes.