It was discovered by finding lines in the spectrum of the Sun that corresponded to calculations for the electronic transitions in helium.
Henry Russell dicovered Triton
he dicovered what was onside the atom he dicovered what was onside the atom
madam curie dicovered gamma rays with the help of his husband.....
1668
no one.......
1755
In 1898
2010
Galileo
india
No god has ever been "dicovered". (Presumably you meant "discovered") Gods have only ever been INVENTED.
j.j Thomson