What Is General Relativity?
A thorough explanation of Einstein's general theory of relativity: from the equivalence principle to curved spacetime, gravitational waves, black holes, and why GPS depends on it.
All articles tagged with "Cosmology"
A thorough explanation of Einstein's general theory of relativity: from the equivalence principle to curved spacetime, gravitational waves, black holes, and why GPS depends on it.
Cosmology is the scientific study of the universe as a whole — its origin in the Big Bang, its large-scale structure, the mysteries of dark matter and dark energy, and its ultimate fate.
The Big Bang is the best-supported scientific account of the universe's origin — but it raises as many questions as it answers. What happened in the first seconds, what existed before, and what caused it all.
Dark matter and dark energy together make up 95% of the universe, yet neither has been directly detected. Learn what they are, why we know they exist, and what scientists are doing to find them.
Dark matter and dark energy make up 95% of the universe, yet neither has been directly detected. Here is what scientists know, suspect, and cannot explain.
A comprehensive guide to astronomy: its history from naked-eye observation to the James Webb Space Telescope, stellar physics, black holes, exoplanets, and the search for extraterrestrial life.