Monthly Archives: January 2016

How The US Controls Helium (And Why That Is Important)

Helium is the second most common element in the universe after hydrogen. But, just as a helium-filled balloon floats up and away if you let go of it, helium doesn’t like to remain earth-bound. Most of it escapes into space, … Continue reading

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How To Build A Helium Star

Artist’s impression of a white dwarf star. Credit: NASA, ESA, STScI, and G. Bacon (STScI). Helium is the second most abundant element, making up roughly a quarter of the (baryonic) matter in the universe. Hydrogen is, of course, the most … Continue reading

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Measurements of Cosmic-Ray Hydrogen and Helium Isotopes with the PAMELA experiment

The cosmic-ray hydrogen and helium (1H, 2H, 3He, 4He) isotopic composition has been measured with the satellite-borne experiment PAMELA, which was launched into low-Earth orbit on-board the Resurs-DK1 satellite on June 15th 2006. The rare isotopes 2H and 3He in … Continue reading

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