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Space appears black because it lacks a medium to scatter light, and the immense distances between stars mean most of it remains dark despite the presence of celestial objects
Unlike Earth's atmosphere, space lacks air or other gases. Without air molecules to scatter sunlight, as they do on Earth, the sky doesn't appear blue but remains dark
Space is a near-perfect vacuum with almost no matter to reflect or scatter light. With no particles to bounce off light waves, space looks black to the human eye
Stars, although bright, are incredibly far apart. The light from stars doesn't fill the entire universe because vast areas of empty space exist between them, creating darkness
Human eyes can only perceive a certain spectrum of light. While cosmic objects emit various types of radiation, much of it is beyond visible light, leaving most of space dark
As galaxies move away from us due to universe's expansion, their light gets stretched into longer wavelengths, shifting toward the red end of the spectrum and becoming invisible
The universe has a finite age of about 13.8 billion years. This means light from distant regions hasn't had enough time to reach us yet, leaving those areas dark and unseen
The universe is filled with cosmic microwave background radiation. However, this radiation is faint and not visible to the naked eye, adding to the overall darkness of space