After the discovery of spectral analysis no one trained in physics could doubt the problem of the atom would be solved when physicists had learned to understand the language of spectra. So manifold was the...

A hundred years ago, Auguste Comte, … a great philosopher, said that humans will never be able to visit the stars, that we will never know what stars are made out of, that that’s the...

Look here, I have succeeded at last in fetching some gold from the sun.{After his banker questioned the value of investigating gold in the Fraunhofer lines of the sun and Kirchhoff handing him over a...

An attempt to study the evolution of living organisms without reference to cytology would be as futile as an account of stellar evolution which ignored spectroscopy.