what is dust lane and emission nebula
Answers
An emission nebula is a nebula formed of ionized gases that emit light of various wavelengths. The most common source of ionization is high-energy photons emitted from a nearby hot star. Among the several different types of emission nebulae are H II regions, in which star formation is taking place and young, massive stars are the source of the ionizing photons; and planetary nebulae, in which a dying star has thrown off its outer layers, with the exposed hot core then ionizing them.
A dust lane is a relatively dense obscuring band of interstellar dust, observed as a dark swath against the background of a brighter object, especially a galaxy. These dust lanes can usually be seen in spiral galaxies (e.g., the Milky Way) when viewed from the edge. Due to the dense and relatively thick nature of this dust, light from the galaxy is reduced by several magnitudes. In the Milky Way, this reduction of light makes it impossible to see the light from the central bulge of the galaxy from Earth. This dust, as well as the gasses also found within these lanes, mix together and combine to form stars and planets.
Dust lane : it is kind of nebula it contain dust and gases but they travel in a specific path like the Saturn rings, in circular path.
Emission Nebula : when nebula emit or produce light it is called emission nebula, the emission or production of light is due to reaction between gases.
Well i think i explained what nebula is in your other question,
Thank you