I am the invisible force that holds galaxies together, yet I remain elusive and unobserved. What am I?

Category: Science · Difficulty: medium

Hint: Think about the mass that doesn't emit light but still has a gravitational pull.

Answer

Dark matter

Explanation

Dark matter does not emit or interact with electromagnetic radiation like normal matter, making it difficult to detect, yet it is believed to comprise about 27% of the universe's mass.

This is a medium science riddle — a moderate challenge for most people. The answer is Dark matter.

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