Helium

While analyzing a solar eclipse in 1868, a French Astronomer by the name of Pierre Janssen discovered Helium. Synthesized from Hydrogen by nuclear fusion, it is the second most abundant element, after Hydrogen, making up 23% of the total mass of all elements. Its name comes from the Greek "ἥλιος" (helios) meaning "sun". It is estimated that our sun produces 700 million tonnes of helium per second. On earth, we are able to find Helium from radioactive decay by elements found underground (typically in natural gas mines). Due to Helium’s inert nature, it doesn’t chemically react with anything.