Subatomic particle having no known substructure In particle physics, an elementary particle or fundamental particle is a subatomic particle that is not composed of other particles.: 1–3 Particles currently thought to be elementary include the fundamental fermions (quarks, leptons, antiquarks, and antileptons), which generally are “matter particles” and “antimatter particles”, as well as the fundamental bosons […]
A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. The boundary of no escape is called the event horizon. […]
The grandfather paradox is a paradox of time travel in which inconsistencies emerge through changing the past. The name comes from the paradox’s description: a person travels to the past and kills their own grandfather before the conception of their father or mother, which prevents the time traveller’s existence. Despite its title, the grandfather paradox […]
The cosmos (UK: /ˈkɒzmɒs/, US: /-moʊs/) is the Universe. Using the word cosmos rather than the word universe implies viewing the universe as a complex and orderly system or entity; the opposite of chaos. The cosmos, and our understanding of the reasons for its existence and significance, are studied in cosmology – a very broad […]
Dark matter is a hypothetical form of matter thought to account for approximately 85% of the matter in the universe and about 27% of its total mass–energy density or about 2.241×10−27 kg/m3. Its presence is implied in a variety of astrophysical observations, including gravitational effects that cannot be explained by accepted theories of gravity unless more matter is present than can be seen. For this reason, most experts think that […]
Earthian Society 