I Dark matter/energy, why must it be there?

  • Thread starter Thread starter Pedro Batista
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Dark matter and dark energy are essential concepts in modern astrophysics, introduced to explain observations that cannot be accounted for by visible matter alone. Dark energy is thought to drive the accelerated expansion of the universe, while dark matter is believed to exist due to gravitational effects observed in phenomena like gravitational lensing, particularly in the Bullet Cluster. The discussion highlights that while dark energy remains a placeholder for an unknown cause of expansion, the evidence for dark matter has strengthened over time, making alternative models less viable. Current detection methods focus on large-scale gravitational interactions, as dark matter does not interact with light or other fundamental forces except gravity. Overall, the consensus is that dark matter must have mass but remains invisible, and ongoing research aims to uncover its nature.
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For clarification, this thread has been attracting some problematic posts that have now been deleted. Thread will remain locked since it is one of those topics that seems to inherently invite personal speculation.
 

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