The visible light region of the electromagnetic spectrum ranges from approximately 400 to 700 nanometers in wavelength and is detectable by the human eye.

Stars generate energy through nuclear fusion reactions in their cores, converting hydrogen into helium and releasing immense amounts of light and heat.

Radio waves possess the longest wavelengths in the electromagnetic spectrum, ranging from millimeters to kilometers.

Stars emit light according to their temperature, following the principles of blackbody radiation. Different temperatures produce different colors, allowing astronomers to estimate stellar temperatures.

Radio astronomy involves observing celestial objects using radio waves, which can penetrate interstellar dust and gas, allowing astronomers to study cosmic phenomena such as pulsars and quasars.

Interstellar dust, composed of tiny particles, absorbs and re-emits starlight as infrared radiation, making it a significant source of infrared emission in astronomy.

X-ray astronomy involves observing celestial objects using X-rays, which are emitted by high-energy processes such as supernovae, black holes, and neutron stars.

The Sun's nuclear fusion reactions in its core produce immense amounts of energy, including ultraviolet radiation, which is emitted into space.

Gamma-ray astronomy involves observing celestial objects using gamma rays, which are emitted by highly energetic processes such as supernovae, black holes, and neutron star collisions.

Stars are the primary source of visible light in astronomy, emitting light due to nuclear fusion reactions in their cores.

Infrared astronomy involves observing celestial objects using infrared radiation, which is emitted by various objects, including stars, planets, and interstellar dust.

The Doppler effect causes the redshift or blueshift of light from distant galaxies due to their motion relative to the observer.

Ultraviolet astronomy involves observing celestial objects using ultraviolet radiation, which is emitted by hot stars, active galaxies, and supernova remnants.

X-rays in astronomy are primarily produced by high-energy processes such as supernovae, black holes, and neutron star collisions.

Gamma-ray astronomy involves observing celestial objects using gamma rays, which are emitted by highly energetic processes such as supernovae, black holes, and neutron star collisions.