Published on March 23, 2022
Stars and Gravity
The life of stars begins with gas clouds everywhere in the universe. These gas clouds contain the most hydrogen (H2) and the second most helium (He).
Gravity pulls a huge cloud of gas towards the center from all sides, the material gets heated due to being compressed and a protostar is born in the central part of the cloud which will turn into a star after millions of years to come.
After becoming a protostar, the surrounding material keeps falling towards the center due to gravity, and the temperature of the protostar also increases due to the compression of the material along with the mess. When the temperature rises to the point where the process of nuclear fusion of hydrogen begins, the protostar becomes a star.
Not all gas cloud material is part of the star. Some of this material is converted into plants. Some parts of plants form moons, asteroids, and comets. And in this way, not only stars but also complete solar systems are formed.
Even after becoming a star, gravity continues to affect the material of the star. For example, the gravity at the surface of the sun is about 28 times greater than that of the earth.
And this gravity tries its best to pull the sun’s material towards the center, but it does not succeed. This is because in a second in the center of the sun 600,000,000,000,000 kilograms of hydrogen is converted to helium by nuclear fusion.
During this process, 400,000,000,000 kilograms of the matter is converted into energy, and the resulting heat heats up the sun’s material, creating pressure from the inside out. This collision of gravity and pressure is the cause of the formation of the sun.
For decades, scientists have claimed that humans are made of stardust, and now, a new survey of 150,000 stars almost 4 years ago shows just how true the old claim is: humans and their galaxies have about 97 Percentages are identical atoms. Yes, and research has shown that life seems to extend more towards the center of the galaxy. The key elements of life on Earth often referred to as the building blocks of life, can be abbreviated as CHNOPS: carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur. For the first time, astronomers have recorded a large sample of stars with an abundance of these elements.
Astronomers estimated the multiplicity of each element using a method called spectroscopy. Each element emits a different wavelength of light from inside the star, and they measured the depth of the dark and bright spots on the light spectrum of each star to determine which elements it is made of.
Although humans share most of the elements with the stars, the proportions of these elements vary between humans and the stars. For example, humans have about 65% of the oxygen content, while oxygen makes up less than 1% of all the elements measured in space (as can be seen in the spectra of the stars).
In the first moments of the universe, every part of space was filled with a kind of pre-nuclear plasma that was even hotter and denser than the center of the largest star.
As the fire spread and cooled, the first building blocks of protons and neutrons, the nuclear nuclei, came into being.
Hydrogen alone appeared in the form of protons containing small amounts of helium and lithium. These elements have been present in the universe for 13.8 billion years since the immediate aftermath of the Big Bang, the formation of the stars, and the gradual emergence of life.
So, yes, you are Stardust. But you are also the ashes of the Big Bang: the ancient nuclear chemistry was formed by gravity and the invincible flow of time.