{"knowledge_schema": {"broad_category": "Cosmology \u2192 Distance Measurements \u2192 Comoving Distance", "refinement": "This problem involves calculating the comoving distance to a quasar based on the parameters of the Lambda-CDM model, which describes the expansion of the universe.", "specific_scope": "The focus is on determining the comoving distance of a quasar observed at a specific wavelength, using the current cosmological parameters provided in the Lambda-CDM model.", "goal": "Estimate the comoving distance of the quasar from Earth, given the cosmological parameters and the observed properties of the quasar."}, "summary": "In this problem, we are tasked with estimating the comoving distance to a quasar based on the Lambda-CDM cosmological model parameters. The model provides a framework for understanding the expansion of the universe, and the current values of the Hubble constant and density parameters are essential for calculating the comoving distance. The goal is to determine how far the quasar is from Earth in gigaparsecs (Gpc) based on the given options."}