Q
What is the edge of the universe?
A
Expert Answer
The universe likely has no edge—it's either infinite or finite but unbounded (like Earth's surface, which has no edge but finite area). The 'observable universe' has an edge (our particle horizon), beyond which light hasn't had time to reach us. That's an observational limit, not a physical boundary.
Key Insight
The universe likely has no edge—it's either infinite or finite but unbounded (like Earth's surface, which has no edge but finite area).
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