It was formed about 5-7 million years ago.
Scientists have discovered inside one of the fragments of the Murchison meteorite, which fell in South Australia in 1969, the particles of Stardust, which was formed in about 5-7 billion years ago and is the oldest solid material ever found on Earth. This is stated in the article of the journal Proceedings of the National Academy of Sciences, according to RVTI.
“This is one of the most exciting studies I worked on. We managed to find the oldest known solid on the planet that tells us about how were born the stars in our Galaxy,” said Philipp heck, one of the study’s authors from the University of Chicago.
The earth, like the Sun itself was formed some 4.5 billion years ago as a result of compression of a cloud of matter composed of interstellar gas and dust. According to scientists, the traces of primordial matter of the Solar system had to be preserved in the depths of the most ancient comets and asteroids.
Way of life all-star is about the same: they are formed from particles of gas and dust, live from several million to several billion years and then die, throwing the building blocks for future stars, satellites, comets and asteroids – Stardust. A number Presolana grains are solid particles formed before the birth of the Sun — hit the meteorite Murchison, where they remained for billions of years and eventually was “delivered” on the Ground. To find them, researchers shattered pieces of a meteorite into powder.
In November, NASA scientists found traces of various sugars in meteorites, which fell to the Ground. A key finding was ribose — a key component of RNA (ribonucleic acid). According to scientists, they found in the Sahara meteorites were extraterrestrial in origin. Such substances could get on the ground as a result of meteor showers. Perhaps they have brought to Earth the organic components, then of which life emerged.