Researchers use all of these:
-- optical telescopes
-- radio telescopes
-- x-ray telescopes
-- infra-red telescopes
-- ultraviolet telescopes
Radiation other than light and radio waves hardly penetrates Earth's atmosphere.
Supernovae are very violent events resulting at the "death" of a star. Typically, they are detected by the very large amounts of radiation energies they release. Supernovae release beams of X-ray and Gamma radiation which instruments like telescopes and special satellites near Earth can detect. The creation of one also releases a great amount of visible light (unlike something like a black hole, for example, which is impossible to see with the naked eye but releases enormous amounts of other radiation that are obvious to special observation equipment).
Radio telescopes, refracting telescopes, and reflecting telescopes all use mirrors or lenses to collect and focus incoming electromagnetic radiation. The main difference is the wavelength of the radiation they are designed to study – radio telescopes focus on radio waves, refracting telescopes focus on visible light, and reflecting telescopes focus on a variety of wavelengths including visible light, ultraviolet, and infrared.
Some other types of telescopes used by astronomers to observe stars include radio telescopes, which detect radio waves emitted by stars, and space telescopes like the Hubble Space Telescope, which is specifically designed for observations in space without the distortion caused by Earth's atmosphere. Astronomers also use infrared telescopes to study stars emitting infrared radiation, providing valuable insights into their composition and temperature.
"Optical" simply means that they work with visible light - as opposed to other EM radiation (radio waves, x-rays, etc.); gravitational waves; etc.
Radio telescopes and Keck telescopes differ primarily in the type of electromagnetic radiation they observe. Radio telescopes detect radio waves emitted by celestial objects, allowing astronomers to study phenomena like pulsars and cosmic microwave background radiation. In contrast, the Keck telescopes, which are optical/infrared telescopes located in Hawaii, observe visible and infrared light, enabling detailed imaging and spectroscopy of stars, galaxies, and other astronomical features. This distinction in wavelength leads to different techniques and instruments used in their respective observations.
Ultraviolet telescopes are used to observe celestial objects emitting ultraviolet radiation, which is not visible to the human eye. They provide valuable information about the composition, temperature, and dynamics of stars, galaxies, and other astronomical phenomena that emit UV light. This can help astronomers study the formation of stars, the evolution of galaxies, and the presence of elements in the universe.
radiation treatment of cancer or other kinds of treatments can be used for cancer.
Light, or some other electromagnetic radiation such as x-rays, radio waves, etc. CW: That is a good answer. I would have guessed dust.
Telescopes that collect electromagnetic radiation in shorter wavelengths, such as ultraviolet or X-rays, need to be placed in dry areas or outside the atmosphere because water vapor and other gases in the atmosphere can absorb or scatter such high-energy radiation, affecting the observations. Placing these telescopes in dry areas or above the atmosphere helps ensure that they can collect unimpeded data in these wavelengths.
Cosmic rays are not part of the EM spectrum -- they are high energy charged particles.
Scientists use telescopes to see into space. Telescopes can be on the ground or in space itself, and they gather light or other electromagnetic radiation from celestial objects to create images of distant planets, stars, and galaxies. Telescopes help scientists study the universe, learn about its origins, and explore its mysteries.