The electromagnetic spectrum encompasses the entire range of wavelengths of electromagnetic radiation, from gamma rays to radio waves.

The main regions of the electromagnetic spectrum are gamma rays, X-rays, ultraviolet, visible light, infrared, microwaves, and radio waves.

Gamma rays have the shortest wavelengths and the highest energy among all regions of the electromagnetic spectrum.

Visible light is the only region of the electromagnetic spectrum that is visible to the human eye.

Dust clouds are the primary source of infrared radiation in astronomy, as they emit infrared radiation due to their temperature.

Ultraviolet radiation is used to study the structure and composition of stars, as it allows astronomers to observe the hot outer layers of stars.

Black holes are the primary source of X-ray radiation in astronomy, as they emit X-rays due to the accretion of matter onto them.

Microwaves are used to study the cosmic microwave background, which is the remnant radiation from the Big Bang.

Pulsars are the primary source of radio waves in astronomy, as they emit regular pulses of radio waves due to their rapid rotation.

Visible light is used to study the polarization of light, which can provide information about the magnetic fields in space.

Active galactic nuclei are the primary source of gamma rays in astronomy, as they emit gamma rays due to the high-energy processes occurring in their centers.

Infrared radiation is used to study the formation and evolution of galaxies, as it allows astronomers to observe the dust and gas in galaxies.

Stars are the primary source of ultraviolet radiation in astronomy, as they emit ultraviolet radiation due to their high temperatures.

Radio waves are used to study the properties of interstellar gas and dust, as they can penetrate through these materials.

Stars are the primary source of visible light in astronomy, as they emit visible light due to their high temperatures.