The essential elements for the chemistry of life are at the center of the galaxy They were formed more or less long ago in places more or less distant from the molecular cloud where they found themselves trapped and which gave birth to our Sun, 4.6 billion years ago (this cloud s ‘is formed by the collapse of matter after the explosion of a supernova… A parent event of our Solar System called Coatlicue).
So where do the roughly 7 trillion trillion atoms (7 × 10 27 atoms) that make us come from? How many different supernovae, neutron star fusions, cosmic rays from across the Milky Way and beyond? Brewed in our galaxy, over its rotations and also through its (numerous) mergers with others, which began more than 13 billion years ago, these atoms therefore have multiple origins. This concerns all of the boron (B), beryllium (Be) that we find in the Solar System and also a small part of lithium (Li).Īll of our atoms are 97% of stellar origin cosmic radiation (in pink in the table), which is less frequent.from the fusion of neutron stars (in orange in the table), very compact, which mainly generated elements like bismuth (Bi), polonium (Po), radon (Rn), francium (Fr) and about half of ruthenium (Ru), cadmium (Cd), antimony (Sb), tellurium (Te), tantalum (Ta), tungsten (W), etc.explosions of white dwarfs (in light blue in the table above), which are mainly responsible for iron (Fe), chromium (Cr), vanadium (V), copper (Cu) or even zinc (Zn).These, exhaling slowly after an existence of several billion years, are the source of much of the carbon (C), nitrogen (N), lithium (Li), etc. death of stars much less massive (in yellow in the table above), as the sun.massive stars which explode in supernovae, a violent process (in green in the table above) which signs for example oxygen (O), sodium (Na), fluorine (F), magnesium (Mg), neon (Ne).Very abundant in the cosmos, these are the raw material of the other elements of the periodic table, which could not be created thereafter except in the cauldron of more or less massive stars of the Big Bang (in dark blue in the table above) with respect to hydrogen (H) and a large part of helium (He).Indeed, the alchemy is not the same according to the conditions of production. © Jennifer Johnson Supernovae, white dwarf explosions: where do our atoms come from? So where do they come from? In dark blue: Big Bang in orange: the fusion of neutron stars in yellow: the death of not very massive stars in pink: cosmic rays in green: massive stars exploding as a supernovae in light blue: explosions of white dwarfs. The astronomer has traced the source for most of the chemical elements because yes, these were produced under different conditions. come from? Jennifer Johnson suggests a new reading of the periodic table in order to see more clearly. What stars do our carbon, iron, nitrogen, etc. Many of them have, it is true, a stellar genesis, but, in his adaptation, the astronomer draws attention to the different conditions required to produce them. Johnson of Ohio University came up with the idea of revisiting the famous Periodic Table of the Elements.
To get a clearer picture of the different processes that have shaped the atoms around us (and to what extent), Jennifer A. body of the Solar System), sums made up of atoms forged through various cosmic events that have marked the 13.8 billion years of the universe ‘s history. Indeed, as recent research on the genealogy of the matter that composes us, all of us, still shows, which obviously includes all living beings (and also all that surrounds us, the planet itself as well as all the others. In his Cosmos series , the astrobiologist declared “the nitrogen in our DNA, the calcium in our teeth, the iron in the blood, the carbon in our apple pies were made inside collapsed stars.
The term “dust of stars ” over by Hubert Reeves for the title of one of his most famous books, is the origin of Carl Sagan. No doubt, 97% of our billions of billions of atoms indeed come from the cosmos. You have undoubtedly heard the expression “we are made of stardust”… Is this a myth or a reality? A team of astronomers, on the trail of this dust, has gone back to their sources.
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