AGN: Active galactic nucleus
AGB: Asymptotic Giant Branch stars
BEC: Bose-Einstein condensate
BKL: Belinsky-Khalatnikov-Lifshitz singularity
CDM: Cold dark matter
CDT: Causal dynamical triangulation
CFT: Conformal field theory
CMB: Cosmic microwave background radiation
CMD: Colour-Magnitude diagram
CPT: It is a fundamental symmetry that involves charge, parity and time
simultaneously.
EPR: Einstein, Podolsky, and Rosen (paradox)
FLRW: Friedmann-Lemaître-Robertson-Walker metric
FTL: Faster-than-light
GRB: Gamma ray bursts
GSO: Geosynchronous orbit
GUT: Grand Unified Theory
HRD: Hertzsprung-Russell diagram
H-R-D: Hertzsprung-Russell diagram
IMBH: Intermediate-mass black hole
LMC: Large Magellanic Cloud
LSP: Lightest Supersymmetric Particle
MU: Mirror Universe
MVI: Many-worlds interpretation
PNGB: Pseudo-Nambu-Goldstone bosons
QCD: Quantum chromodynamics
QED: Quantum electrodynamics
QFT: Quantum field theory
RGB: Red Giant Branch stars
S: Scattering matrix
SUSY: Supersymmetry
UFT: Unified field theory
WR: Wolf-Rayet stars