Deneb's estimated distance of 1400 light- years comes from spectroscopic parallax measurements.

Question

Quizplus · Accepted Answer

Spectroscopic parallax, which involves estimating the distance to a star by comparing its observed brightness with its intrinsic luminosity (derived from its spectral type), is indeed a method used to estimate the distance to stars like Deneb. Given Deneb's brightness and spectral classification, its distance has been estimated to be around 1400 light-years using this technique.

Deneb's Estimated Distance of 1400 Light- Years Comes from Spectroscopic