Astronomers from the Czech Republic and Argentina have employed the Gemini South telescope to observe a yellow supergiant ...

The light from each star is directed through a prism to produce a spectrum. Each of the spectra has a set of absorption lines created by the presence of hydrogen in the stars' atmospheres.

THE numerous absorption spectra of soluble substances which have been described hitherto, have referred as a rule to the solutions of the substances, and but rarely to the solid substances themselves.

The third step is to identify the atmospheric composition of each planet they've discovered by analyzing the unique absorption spectrum of the star's light after passing through it. Knowing what ...

This causes an absorption spectra, as shown below. Because the energy levels are the same, the lines in the emission spectra of an element are in the same position as the lines in the absorption ...

This happens with light as well as sound. When we look at the spectrum of a star in another galaxy, the absorption spectrum is there, but the pattern of lines has moved, or ‘shifted’, towards ...