In the case of special relativity, these include the principle of relativity, the constancy of the speed of light, and time dilation.
The predictions of special relativity have been confirmed in numerous tests since Einstein published his paper in 1905, but three experiments conducted between 18 were critical to its validation.
The International Astronomical Union recognizes 88 constellations covering the entire northern and southern sky.
Here is a selection of the most familiar and easily seen constellations in the northern sky.
Measurement of separate events must satisfy these conditions and match the theory's conclusions.
Relativity is a falsifiable theory: It makes predictions that can be tested by experiment.
It seemed to offer little potential for experimental test, as most of its assertions were on an astronomical scale.