Nebulae are large clouds of dust, gas, and plasma in space. They are often considered the birthplace of stars and galaxies, as they are rich in the materials needed for the formation of new stellar bodies. There are several different types of nebulae, including emission nebulae, reflection nebulae, and planetary nebulae. Studying nebulae can provide valuable insights into the processes of star formation, the chemical composition of the universe, and the evolution of galaxies. Researchers use a variety of telescopes and instruments to study nebulae, including optical telescopes, radio telescopes, and space-based observatories like the Hubble Space Telescope.