Astrophysicists believe the dominant hot spots in the cosmic background radiation should be about 1° in angular size if the universe is flat. What do experimental measurements of this angular size
Explanation:
In a flat universe, Euclidean geometry applies at the very largest scales. This means parallel lines will never meet, and the internal angles of a triangle always add up to exactly 180 degrees—just like you're used to. But in curved universes, whether finite or infinite, things get weird
