One is that time would clearly appear to pass more slowly for the object traveling close to the speed of light relative to slower moving bodies around it.

Neil deGrasse Tyson explains why we can’t go faster than light—because time itself stops. Relativity reveals a mind-bending universe where light exists outside time. Science fiction? Nope ...

Why does time change when traveling close to the speed of light? – Timothy, age 11, Shoreview, Minnesota Imagine you’re in a car driving across the country watching the landscape.