Kirchhoff and Engshtrom

This way you can quickly and easily prove the presence in the solar atmosphere known substances, what are the sodium, magnesium, calcium, iron, hydrogen, etc., but any detailed study presents many difficulties, first of all need to very accurately define the Fraunhofer lines. Kirchhoff and Engshtrom (Angstrom) have done this work with great care: they noted a large number of lines. But it soon turned out that more sophisticated tools allow us to see a much larger number of dark lines, engaged in research of their English physicist Lockyer (Lokyer). Now picture the important services provided by spectroscopic studies and expanded the meaning of the latter. We now know that in the composition of the Sun is more than half of the earth elementov5. Remarkably, the Sun proved the presence of a small number of non-metallic bodies - only hydrogen, carbon and silicon. Quite whether the lack of rest, or just watch them very difficult - a question that will be resolved in the future. Conversely, the presence of metals and especially those with high atomic weight, it is proved beyond doubt.