It wasn’t until the 1850s that Ångström discovered that elements both emit and absorb light at characteristic wavelengths, which is what spectroscopic analysis of stars is based on, so I’m leaning toward justifiable.
It wasn’t until the 1850s that Ångström discovered that elements both emit and absorb light at characteristic wavelengths, which is what spectroscopic analysis of stars is based on, so I’m leaning toward justifiable.