Astrophysics & AI with Python: Unlocking the Secrets of Spectral Lines and Redshift (opens in new tab)

The universe is a symphony of light, but to the naked eye, it often looks like a static painting. Stars are points; galaxies are fuzzy patches. But hidden within that light is a rich, dynamic story—a cosmic fingerprint that tells us exactly what an object is made of, how hot it is, and—most importantly—how fast it is moving away from us. This is the power of spectroscopy, the astronomer’s most indispensable tool. By breaking light into its constituent wavelengths, we transform a single beam o...