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What are the two main types of bright nebulae?
The two main types of bright nebulae are emission nebulae, which emit light from ionized gases, and reflection nebulae, which reflect light from nearby stars. Emission nebulae are usually red or pink in color, while reflection nebulae appear blue due to scattering of light.
What is the difference between reflection nebulae and emission nebulae?
Reflection nebulae reflect light from nearby stars, appearing blue due to scattering of light by interstellar dust. Emission nebulae emit light themselves, typically due to ionized gases within the nebula that are excited by nearby hot stars.
Why do emission nebulae appear red when they surround blue stars?
Emission nebulae appear red when they surround blue stars because the blue stars emit high-energy ultraviolet radiation which ionizes the hydrogen gas in the nebula, causing it to emit red light through a process called hydrogen-alpha emission. This red light is more prominent than the blue light emitted by the stars, giving the nebula its red color.
What is the difference between a dark reflecting nebula and light relfecting nebula?
Dark reflecting nebulae appear dark because they are dense clouds of gas and dust blocking the light from stars behind them. Light reflecting nebulae, on the other hand, appear bright because they reflect the light of nearby stars, often due to the presence of reflective dust particles.
In the milky way the most abundant gas in emission nebulae is?
The most abundant gas in emission nebulae in the Milky Way is hydrogen. Emission nebulae are commonly made up of ionized hydrogen gas that emits light as it recombines with electrons. This creates the vibrant pink and red colors often seen in these nebulae.
