On what primary basis do astronomers classify different categories of nebulae?
Answer
How they interact with light
The diverse forms of nebulae are classified by astronomers based on how they interact with the light emanating from nearby stars. This interaction dictates their visibility and function within the cosmos. For example, Emission Nebulae glow via ionization, Reflection Nebulae scatter light, and Dark Nebulae are defined by blocking light from objects positioned behind them. This classification scheme directly relates the visual manifestation of the object to its underlying physical processes.
Related Questions
What Latin word serves as the origin for the term "nebulae" describing glowing celestial structures?What specifically constitutes a nebula, defined scientifically as an interstellar cloud?How does the density of a typical nebula compare to a terrestrial vacuum chamber?On what primary basis do astronomers classify different categories of nebulae?What process causes Emission Nebulae to glow vibrantly, often showing a reddish color?Why do Reflection Nebulae often exhibit a blue appearance when observed?How are Dark Nebulae made visible to astronomers observing distant objects?What is the factual reason why Planetary Nebulae are unrelated to planets?What key material composition distinguishes Supernova Remnants in interstellar space?What specific element's excitation is responsible for the strong reddish-pink hue in regions like the Lagoon Nebula?