In physics, a frame of reference is an abstract co-ordinate system that uniquely fixes a point within a universe. That point is described in terms of location and orientation, but the universe itself ...

This is the problem of “simultaneity” and is one of the conclusions from special relativity - different frames of reference may not agree on the order of events.

After beginning the book with a section on cosmology and particle physics, Prescod-Weinstein delves into the culture of the mainstream scientific community, and how it has influenced the progress of ...

That is the question asked by a physicist in Germany, who has calculated the lower limit for the lifetime of the photon to be three years in the photon’s frame of reference.