Triple

Target class: astrophysical quantity
Context triple: [Hubble constant, instanceOf, astrophysical quantity]

• A. physical quantity chosen
  A physical quantity is a property of a physical system that can be measured and expressed as a numerical value with an associated unit.
• B. physical constant
  A physical constant is a fundamental, invariant quantity in nature that has a fixed numerical value and characterizes the behavior of physical laws.
• C. astrophysical model
  An astrophysical model is a theoretical or computational framework that describes and predicts the physical processes, structures, and evolution of astronomical objects and phenomena in the universe.
• D. astronomical reference parameter
  An astronomical reference parameter is a standardized value or constant used to define, calibrate, or relate measurements in astronomy, such as positions, motions, or physical properties of celestial objects, within a chosen reference frame or system.
• E. astronomical object
  An astronomical object is any naturally occurring physical entity in space, such as stars, planets, moons, asteroids, comets, or galaxies, that exists within the universe.
• F. None of above.