spacedistance
Spacedistance is a term used to describe a measure of separation between two objects in space. Depending on the context, it can refer to several related concepts, including straight-line distance in a three-dimensional space, the angular separation on the sky, or various cosmological distance definitions used in astronomy.
In Euclidean space, the spacelike distance between two points with Cartesian coordinates (x1, y1, z1) and (x2,
Angular distance, or separation on the celestial sphere, measures how far apart two objects appear from an
Cosmological distances distinguish how redshift and the curvature of spacetime affect the relationship between distance and
Measurement methods for spacedistance range from direct geometric techniques like parallax for nearby stars to indirect
In relativity, the concept of spacetime distance generalizes these ideas via the spacetime interval, which remains