How Gold came to Earth?

Are you wearing a gold ring? Or perhaps gold-plated earrings? Maybe you have some gold fillings in your teeth… for that matter, the human body itself naturally contains gold — 0.000014%, to be exact! But regardless of where and how much of the precious yellow metal you may have with you at this very moment, it all ultimately came from the same place.

Well many of you will be wondering how such a precious metal like gold came into existence on the Earth? Many theories are associated with this incident, but the one which many researchers believe to be the main reason for gold coming onto the earth is Collision of Dead Stars. The origin of the universe's gold is mysterious, since it's not formed within stars like lighter elements such as carbon and iron. But the mystery may now be solved, as a new study posits that the collision of two Neutron Stars— the tiny, incredibly dense cores of exploded stars — could catalyze the creation of the valuable metal.

Recent research by scientists at the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts has revealed that considerable amounts of gold — along with other heavy elements — are produced during impacts between Neutron Stars, the super-dense remains of stars originally 1.4 to 9 times the mass of our Sun. "Researchers have estimated that the amount of gold produced and ejected during the merger of the two neutron stars may be as large as 10 moon masses – That's quite a lot of bling!!"

Neutron stars are created when giant stars die in Supernovas and their cores collapse, with the protons and electrons essentially melting into each other to form neutrons.Neutron stars are city-size stellar objects with a mass about 1.4 times that of the sun. Born from the explosive death of another, larger stars, these tiny objects pack quite a punch.After the collision of stars there was a bright and energetic explosion called Gamma Ray Burst which illuminated the whole space for few seconds. The glow behaved like it came from exotic radioactive elements. The neutron-rich material ejected by colliding neutron stars can generate such elements, which then undergo radioactive decay, emitting a glow that's dominated by infrared light
How much gold is there on Earth, by the way? Since most of it lies deep inside Earth’s core and is thus unreachable, the total amount ever retrieved by humans over the course of history is surprisingly small: about 172,000 tonnes, or enough to make a cube 20.7 meters (68 feet) per side .Some other estimates put this amount at slightly more or less, but the bottom line is that there really isn’t all that much gold available in Earth’s crust… which is partly what makes it (and other “precious” metals) so valuable.