How to Test the Effects of Special Relativity on the Universe

There are some other ways we might be able to test this theory. gamma ray bursts, where something out there in the universe sends a huge spray of very high-energy gamma rays all about the same time. These things can last for like seconds or minutes. The value of this test is that the photons are super duper high energy because they come from some astrophysical source and they fly through a huge amount of curvature. So even the small effects of curvature add up over very long distances.