spectra

Astronomers can tell whether there’s a black hole in the galaxy by looking at large emission lines in their spectra, created by gas around the black hole swirling at high speed.

That sparked the scientists to look back at the galaxy’s sleepy past using archived images and spectra from six different telescopes.

So, the students looked through Frebel's binder for stars with spectra, or measurements of starlight, that indicated low abundances of strontium and barium.

To demonstrate their system's capability, the researchers used it to acquire the spectra of six types of resins and employed a neural network to classify the spectra pixel-by-pixel in multiple wavelengths.

"GHOST's extremely high-quality spectra offered unprecedented resolution," said Saffe, "allowing us to measure the stars' stellar parameters and chemical abundances with the highest possible precision."