Relativity and Space-time
are emitted by accelerating masses.
Electromagnetic waves are produced when charges are accelerated by electric or magnetic fields.
are produced when masses are accelerated by gravitational fields.
In 1919, Sir Arthur Eddington observed the
gravitational bending of starlight
during a solar eclipse
of the perihelion of Mercury.
Spacetime is warped around the Sun
Quasars can be gravitationally
lensed by foreground galaxies to produce multiple images.
A day-in-your-life space-time diagram