Tuesday, August 9, 2022

What Secrets reveal stars?

We'll take a trip back in time to ancient Greek mythology: Stars reveal a lot of secrets and tell incredible stories not only about the past but also about the future. Constellations are based on the shapes of bright stars which appear close to each other in the night sky. Some of them were seen by ancient Greeciens as gods and goddesses. Furthermore, The brightest stars in our night sky are an object of constant interest to astronomers as well. Because they are relatively close to us, some appear very bright. they are massive and very hot, as a result, they emit lots of radiation. Some stars seem dim because they're old or far away. We cannot determine a star's age from its brightness, but we can use this aspect to study them.

Firstly, we will Discover the composition of stars. Secondly, we‘ll step back for a moment and think about how stars are formed. And finally, we'll look deeper into some other stellar mysteries and answer the question: Are we made of Stars?

What are inside stars?

Celestial bodies, such as stars, are composed primarily of hydrogen and helium. Thermal Radiation from their cores generates light and heat. In addition to oxygen, the elements: carbon, neon, and nitrogen tend to dominate, with iron being the most common metal element. The sun and other stars are composed mostly of hydrogen, which functions Like a hydrogen bomb, Stars burn bright for billions of years by converting hydrogen into helium. As a result, the sun is constantly nuclearly exploding, and only appears solid because of its gravity. Despite their beauty, some stars shine brighter than others. Hot stars appear white or blue when observed from Earth, while cooler stars appear orange or red. Hertzsprung-Russell diagrams are useful for classifying stars based on their luminosity and temperature

How are stars formed?

The more massive the star is the shorter its life span. The formation of Stars takes place inside Nebulae, which are often star-forming regions. Eventually, the gas, dust, and other materials ( tiny elements ) huddle together to form denser regions, which attract more matter. The tiny particles in these Regions gain more mass as they increase in size to become finally denser enough to develop into stars. A thousand years later, gravity is introduced to the equation. The protostar is designed as a contracting mass of gas that represents a star's nascent phase. the particles in the newly formed star drag downward because of their weight. Astronomers have difficulty detecting protostars because dust obscures them in nebulae. The conservation of angular momentum causes a protostar to spin faster as it gets smaller and during this time, a star enters what is known as the relatively brief T Tauri phase. After Millions of years star's main sequence begins when its core reaches 27 million degrees Fahrenheit and nuclear fusion begins. It is the most long Period of the Stars transformation (Lifespan)

Are we made from stars?


In the human body, nearly all elements were born from a star - a phrase often quoted. Carl Sagen once said: "We are a way for the universe to know itself. Some part of our being knows this is where we came from. We long to return. And we can, because the cosmos is also within us. We're madestar stuff," As well as all other heavy elements, carbon, nitrogen, and oxygen were created in previous generations of stars over 4.5 billion years ago. Almost all of the matter on Earth, including humans and other animals, contains these elements. All organic matter containing carbon was produced originally in stars.





The study of astronomy, astrophysicists, and cosmology encompasses a wide variety of topics, and there is still much to learn



Sources :

Book :The Disordered Cosmos

Websites :

https://www.livescience.com/32828-humans-really-made-stars.html

https://www.nationalgeographic.com/science/article/stars
https://telescopicwatch.com/stars-made-of/
https://www.zmescience.com/science/what-are-stars-made-of-0432/




Written by: Fatima Ibnoutalib
Foto was taken by: Marvin Sandi



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