You searched for: “telespectroscope
telespectroscope
1. A combination of a telescope and a spectroscope, used for spectroscopic analysis (to determine the chemical composition, energy levels, and molecular structure of substances) of radiation from stars and other celestial bodies.
2. A spectroscope arranged to be attached to a telescope for observation of distant objects; such as, the sun or stars.

A spectrum is a charted band of wavelengths of electromagnetic vibrations obtained by refraction (bending of waves) and diffraction (wave train that passes an obstacle of secondary waves that are set up which interfere with the primary wave and give rise to bands of constructive and destructive interference).