Astronomy: Spectroscopy

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Commentary

Spectroscopy Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, ultraviolet, X-ray, infrared and ra dio waves that radiate from stars and other celestial objects. A stellar spectrum can reveal many properties of stars, such as their chemical composition, temperature, density, mass, distance and luminosity. Spectroscopy can show the velocity of motion towards or away from the observer by measuring the Doppler shift. Why Spectroscopy matters: These foundational ideas and techniques are the tools astronomers use to measure, classify, and understand everything from nearby planets to the most distant galaxies. Spectroscopy is also used to study the physical properties of many other types of celestial objects such as planets, nebulae, galaxies, and active galactic nuclei. Deep dive: Spectroscopy Spectroscopy continues to be an active area of research in modern astronomy. Source: https://en.wikipedia.org/wiki/Astronomical_spectroscopy (Wikipedia, CC BY-SA)

Sources: Wikipedia (CC BY-SA)