Definition

Noun: - (Cosmology) A hypothetical one-dimensional subatomic particle: A cosmic string is a theoretical, extremely thin but incredibly dense filament or loop of concentrated energy. It is a topological defect, a kind of "crack" in spacetime, predicted by some models of the early universe.

Usage

• Scientific Context: The term is used almost exclusively in theoretical physics and cosmology to discuss the structure and evolution of the universe.
  • Some theories suggest that cosmic strings could have formed during a phase transition in the early universe.
  • If they exist, the gravitational influence of a cosmic string might cause observable effects, such as double images of distant galaxies.

Advanced Usage

• "Network of cosmic strings": Refers to the theoretical idea that many such strings might form a complex web stretching across the cosmos.
  • The model predicts a tangled network of cosmic strings that could generate gravitational waves.

Variants and Related Words

• String (in cosmology): Often used as a shorthand for "cosmic string."
• Topological defect: A broader class of theoretical structures in spacetime, which includes cosmic strings, domain walls, and monopoles.

Synonyms

• Space-time string: A less common synonym emphasizing its nature as a defect in the fabric of spacetime.
• Cosmic filament (in this specific theoretical context): Though "filament" more commonly refers to structures of galaxies, it can sometimes be used analogously.

Related Concepts (Not Synonyms)

• Gravitational lensing: A phenomenon that a cosmic string might cause.
• Phase transition: The process in the early universe that might have created cosmic strings.
• Grand Unified Theory (GUT): A class of theories that often predict the existence of such cosmic defects.

Noun

1. (cosmology) a hypothetical one-dimensional subatomic particle having a concentration of energy and the dynamic properties of a flexible loop