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Hydrogen and Helium

Hydrogen is an element, usually in the form of a gas, that consists of one proton and one electron. Hydrogen is the most abundant element in the universe, accounting for about 75 percent of its normal matter, and was created in the Big Bang. Helium is an element, usually in the form of a gas, that consists of a nucleus of two protons and two neutrons surrounded by two electrons. Helium is the second-most abundant element in the universe, after hydrogen, and accounts for about 25 percent of the atoms in the universe. Most of the helium in the universe was created in the Big Bang, but it also is the product of hydrogen fusion in stars.

Radio Programs

Declining Birth Rate The declining stellar birth rate March 17, 2023

Helium-3 Future prospecting on the Moon July 29, 2022

‘Gassy’ Sun The recipe for a star May 10, 2021

Helium A common but rare element September 11, 2019

Solar Discovery Discovering a key part of the Sun August 17, 2018

Making Elements Brewing up a universe of elements March 6, 2017

Featured Images

Sketches of the total solar eclipse of August 1868

Solar Discovery August 17, 2018