ScienceJuly 4, 2026
relativity
/ˌrɛləˈtɪvɪti/
Definition
Albert Einstein’s scientific theories describing how space, time, and gravity behave, particularly when physical measurements depend on the observer's relative motion.
Etymology
Derived from the Latin 'relativus', meaning 'having reference or relation.' It entered English in the 19th century, eventually becoming the standard term for Einstein’s framework of physical laws.
In the news
The article explains that disproving the existence of the luminiferous ether was a crucial breakthrough that paved the way for Einstein's theories of special and general relativity.
Space science has come a long way since July 4, 1776. Here's a look back at the saga
Read the full article ↗Space