Gázfelh

A gázfelh, often translated as gas cloud, is a general term used in astronomy to describe a collection of gas and dust in interstellar space. These clouds are primarily composed of hydrogen and helium, the most abundant elements in the universe, with smaller amounts of heavier elements and dust particles. Gázfelh are of great importance in astrophysics as they are the birthplaces of stars. Within these vast nebulae, gravitational forces cause denser regions to collapse, leading to the formation of protostars. As these protostars gather more mass, their internal temperature and pressure increase until nuclear fusion ignites, marking the birth of a new star.

The appearance and properties of gázfelh vary widely. Some are diffuse and transparent, visible only through the light they absorb or emit. Others are dense and opaque, obscuring the light from stars behind them, and are known as dark nebulae. Emission nebulae, on the other hand, glow brightly, illuminated by nearby hot stars that excite the gas within them to emit light at specific wavelengths. Reflection nebulae are illuminated by starlight that is scattered by the dust particles within the cloud. Studying the composition, temperature, and density of gázfelh provides crucial insights into the processes of star formation and the chemical evolution of galaxies.