Last week's lesson was time dilation, and you hopefully understand the basics of how it works. Cliff notes: According to Einstein's theory of relativity, the faster you travel, the slower time passes.

Traveling to another star is not just difficult—it may be physically impossible with current technology. Explore the enormous ...

Albert Einstein’s “twin paradox” is a famous counterintuitive implication of the special theory of relativity, but it also reveals deep links between physics and philosophy, as Robert P Crease ...

I have a question regarding time dilation that I thought of last night listening to an audiobook, Project Hail Mary. I am an amateur astrophotographer, and marvel at the distance to deep-space objects ...