What's the difference between antimatter and dark matter?
I'm curious to know, what are the fundamental differences between antimatter and dark matter? How do they differ in their properties, interactions with the universe, and their potential role in explaining the mysteries of the cosmos? Could you elaborate on the scientific understanding of these two enigmatic phenomena?
How expensive is dark matter?
Excuse me, but I was wondering if you could help me understand something about dark matter. I've heard a lot about it in the context of cosmology and astrophysics, but I've never really grasped the concept of how 'expensive' dark matter could be. Is there a tangible way to measure the cost or value of dark matter, or is this simply a metaphorical term used to describe its elusive nature and significance in the universe? I'm genuinely curious and would appreciate any clarification you can provide.