18 августа 1868 года обнаружен новый элемент – гелий

On the French astronomer Pierre Jules César Janssen first examined the sun’s outer envelope during a total solar eclipse in India. A spectral analysis of the solar prominences revealed a new yellow line that did not belong to any previously known element Two months later, without any solar eclipse, this line was discovered by the English astronomer Joseph Norman Lockyer. He suggested that the new element be named helium, after the sun. It would not be discovered on Earth until 1895.