Introduction to the Hubble Telescope, What is the Hubble Telescope?

The Hubble Telescope, which is meters long, meters in diameter, and weighs tons, cost nearly $3 billion, was launched into orbit at an altitude of 590 kilometers on April 25, 1990, by the United States Space Shuttle (Figure 1). The Hubble telescope orbits the silent space orbit at 10,000 kilometers per hour, silently peeking into the secrets of space. Figure 1: Hubble Space Telescope.

The Hubble Telescope is the largest and most accurate astronomical telescope ever built. Its wide-angle planetary camera can capture dozens to hundreds of stars**, and its clarity is more than 10 times that of a ground-based telescope, and its observation power is equivalent to seeing a firefly in Sydney 10,000 kilometers away from Washington.

In April 1999, using deep space images taken by the Hubble telescope, researchers at the State University of New York at Stony Brook discovered an ancient galaxy 13 billion light-years away from Earth near the edge of the universe, which is the most distant object ever discovered. Using a new near-infrared instrument, through the vast interstellar space, people discovered the star "Pisto", which is the largest celestial object ever discovered. Using the Hubble telescope's wide field of view and planetary cameras, scientists obtained the first optical picture of a gamma-ray burst**; The superspectrograph on the Hubble telescope revealed the chemical composition of the supernovae.

The images and information collected by the Hubble Telescope are transmitted through satellites and ground-based data transmission networks to the Space Telescope Science Research Center in the United States. Using these extremely valuable space images and cosmic data, scientists have achieved a series of breakthrough achievements. The field of astronomy, which has been dormant for many years, is undergoing earth-shaking changes.

Hubble is expected to "retire" in 2010. The development of space telescopes in the 21st century is in full swing around the world. At the beginning of the 21st century, several large astronomical observation equipment will be sent into outer space, which will be another large-scale human exploration of space after the brilliant achievements of the Hubble telescope.

A lifetime of Hubble?

The Hubble Telescope is the first space telescope in human history and the most advanced space telescope currently available.

The concept of space telescopes first appeared in the 1940s, and in the 70s and 80s of the 19th century, NASA collaborated with the European Space Agency to design and build space telescopes. In 1990, the world's first space telescope was launched, and the designers named it after the American astronomer Edwin Powell Hubble (1889-1953).

On April 22, 1990, the space shuttle "Discovery" launched the Hubble telescope into the earth's orbit, and the Hubble telescope began to operate at an altitude of 600 kilometers above the ground, getting rid of the interference of the earth's atmosphere on astronomical observations, so its power is far greater than that of ground-based optical telescopes. The Hubble telescope weighs about 11 tons, has a focal length of 57.6 meters, has a resolution of 0 005, 100 times that of a large ground-based telescope, and observes wavelengths ranging from 120 nanometers in the ultraviolet to 1200 nanometers in the infrared, at a cost of $1.5 billion. With the help of the Hubble telescope, humanity has deepened its understanding of galaxy formation, roughly determined the age of the universe's birth, increased its knowledge of the evolution of stars, discovered evidence of the existence of black holes, and explored the structure of the universe through the study of distant quasars.

The Hubble telescope orbits the Earth, with an average orbital altitude of 569 kilometers and a period of 97 minutes around the Earth.

The Hubble Space Telescope observes a straight line of view. Although it orbits the Earth and its lens appears to be the plane of its orbit, the telescope is equipped with three fine guide sensors (FGS) to maintain the accuracy of the telescope's pointing during observations, so even if it is orbiting the Earth, it can be sure that its lens is accurately aimed at the target during the shooting time.

As for the speed of transmission of the Nashen Luguang, it is not a problem at all. With the naked eye, we can also see the Andromeda Daxiaoqiao galaxy more than 2 million light-years away, and we can also see the sky full of stars, although the light we see was emitted tens of thousands or even millions of years ago. I can see the stars, and so can the Hubble Space Telescope.

And because there is no "troublemaking" in the atmosphere, it can see farther and more clearly.

Hubble's life of filial piety with the telescope? Clever hall.