UniverseThe cosmos, everything that exists
Definitions:
All matter and energy, including the earth, the galaxies, and the contents of intergalactic space, considered as a whole.
QuantumA minimum amount of something, especially energy
Definitions:
A quantum is the minimum amount of any physical entity involved in an interaction.
RelativityThe concept related to the principles of Albert Einstein
Definitions:
Relativity is the idea that space and time are linked for objects that are moving at a consistent speed in a straight line. This could be you, moving in a car, or a light beam moving through space.
CosmologyThe scientific study of the universe and its origins
Definitions:
Cosmology is the scientific study of the large scale properties of the Universe as a whole.
NotionA general understanding or theory
Definitions:
A conception of or belief about something.