How are Dark Nebulae made visible to astronomers observing distant objects?
Answer
By observing the light from stars or brighter nebulae obscured behind them
Dark Nebulae are dense clouds composed of cold gas and dust, making them opaque. Consequently, they do not emit or reflect observable light themselves. Their visibility is achieved indirectly; they are identified because they effectively block or obscure the light originating from stars or brighter nebulae situated farther away in the background. They stand out in stark contrast against the luminous objects they conceal, acting as cosmic silhouettes.
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