Time is relative: it can differ.

This concept, known as time dilation, arises from Albert Einstein's theory of relativity. Time is not constant but can be experienced differently depending on factors like speed and gravity. For example, time passes slower for objects in motion or under the influence of a strong gravitational field. This phenomenon has been confirmed through experiments and is a fundamental aspect of modern physics, challenging our intuitive understanding of time as a fixed and universal quantity. Time dilation plays a crucial role in fields like astronomy, where it affects how we perceive events in the vast expanse of the cosmos.