Если “снаружи” ничего нет, куда расширяется Вселенная?

This question seems logical, but in cosmology, it violates conventional intuition: it's not "into the void" that expands, but space itself—so the idea of ​​"outside" may be meaningless. This is precisely where strange comparisons like the surface of a sphere without a boundary come from: you can measure distances inside, but you can't go "beyond" the boundary. We'll examine in simple terms what expansion means, why the universe doesn't necessarily need to expand "somewhere," and where the line is between physics and a false mental image. Subscribe—there will be more such calm analyses, after which the cosmos becomes more understandable, not more mystical.