There are several types of telescopes.

Infrared: They see all objects with a temperature above absolute zero and emit some form of electromagnetic radiation. Such a telescope uses infrared light to detect celestial objects. Infrared light is one of several types of radiation present in the electromagnetic spectrum. The prototype of an infrared telescope was developed in 1961, and its popularity increased in the middle of the 1960s. There are ground-based, airborne, or space telescopes. The latter is the most effective because water vapor in the Earth’s atmosphere absorbs infrared radiation.
Ultraviolet: They use shorter wavelengths than visible light. Such telescopes can catch the part of the spectrum between the portion seen as visible light and the portion occupied by X-rays. As ultraviolet is invisible to humans and the planet’s atmosphere absorbs most of it, observations at these wavelengths must be performed from the upper atmosphere or from space. Scientists use rockets and satellites.
X-ray: These telescopes use shorter wavelengths than ultraviolet light. They observe remote objects in the X-ray spectrum. Usually, such telescopes are placed on rockets and satellites to remove the effect of the atmosphere. Special optics collect the X-ray lights for further analysis. The first X-ray telescope was invented in 1963 to observe the sun.
Radio: They use even longer wavelengths. Such telescopes use an antenna or a radio receiver to detect radio waves from space objects. They look like a parabolic-shaped metal dish or a mash. It reflects the waves to an antenna above the dish. The longer the antenna, the weaker signals it can detect. After that, the amplified signal is processed by a computer to turn the radio signals into an image that follows the shape of the radio emission. Such telescopes can be used at any time of the day.
Optical telescopes: They gather and focus light mainly from the visible part of the electromagnetic spectrum. There are refracting, reflecting, and catadioptric types. These are the most popular telescopes for beginners, so we’ll tell you more about them.

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