WebDevelopersNotes logo

home-icon Home / Events on 18 August / Helium discovered

Helium discovered

Helium discovered in the solar chromosphere by Pierre Janssen. The element wasn't known to occur on earth.

18 August, 1896

Helium was discovered by Pierre Janssen on 18th August 1896. The French astronomer was observing the solar eclipse at Guntur (now in Andhra Pradesh, India) and noted bright lines in the spectrum of the solar chromosphere. This meant the chromosphere is gaseous. A bright yellow line in the spectrum which had a wavelength of 587.49 nm was also recorded. Though not immediately studied, the line proved to be of helium, an element not known to exist on earth. This was the first time an element, which wasn’t known to occur on earth, was discovered on an extra-terrestrial body.

Your comments
Star icon IMPORTANT Have a question / problem? Click here to ask an expert.

Sponsored Links

Tips

How do I view a deleted web page?
Is there a way to view a deleted web page - one that is no longer available? Yes there is and the solution is quite simple. [more...]

Fact

Bezos wanted a company name that started with the letter "A". After much deliberation and pouring over the dictionary, he settled on "Amazon" because it conveyed a place that was "exotic and different". [more...]

We use cookies to give you the best possible website experience. By using WebDevelopersNotes.com, you agree to our Privacy Policy