Space

“Using a technique called spectroscopy, scientists can split the infrared light from stars and galaxies into different colors, similar to how sunlight hitting a prism separates into a rainbow of visible hues. An object’s spectra can reveal many useful characteristics, including its composition, density, temperature and motion.”

“Using a technique called spectroscopy, scientists can split the infrared light from stars and galaxies into different colors, similar to how sunlight hitting a prism separates into a rainbow of visible hues. An object’s spectra can reveal many useful characteristics, including its composition, density, temperature and motion.”

https://www.nbcnews.com/science/space/nasa-spherex-space-observatory-launch-map-galaxies-universe-rcna190877