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.
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Billions of dollars are spent on research in the field of laser thermonuclear fusion. Why is it needed and what successful experiments have already been done? Speaker: Mikhail Leonidovich Shmatov, Doctor of Physical and Mathematical Sciences
