From childhood, we are looking at the sky during the day. In this sky, we know very well about the Sun, the moon, and the stars because we see them every day. Even though we don't know what happens in the sky, the everyday Sun rises in the East and the Sunsets on the west in the day time.
In the night, time moon blows and stars shining on the sky, which looks very beautiful, but the atmosphere is not just like empty it includes all the objects. The Universe is everything that exists.
Today My Topic is Exploring the Universe, which we know very well. Just Imagine if the Universe does not exist, what will happens? So it is essential to the living organisms, in this empty space, what is the hidden concept is behind.
Universe
The Universe is vast beyond our Imagination. It is mostly empty space. This space contains everything from the tiniest subatomic particles to super galactic structures. It is estimated that the Universe contains 100 billion galaxies, each of which comprises 100 billion stars. The Universe probably came into existence about 10-20 billion years ago.
In this Universe, there is lots of going on that is invisible to the eye.
The Milky Way
Our Galaxy is called the Milky Way Galaxy because it looks like a splash of the milk in the sky. In the night, a faint band of light is visible in the northern sky. This dim light comes from the Nebulae and stars. The Galaxy is vast, measuring about 1,00,000 light-years across ( 1 light year is approximately 9,460 billion km). Our Galaxy is a spiral-shaped disc with a bulge at the sending four arms spiraling outwards.
The Life of a St
A galaxy is a vast mass of stars, nebulae, and interstellar dust and gases. Nebulae are clouds of dust and gas (Mainly Hydrogen and ionized Hydrogen) that float in space. Often, the force of gravity pulls the particles of gas and dust closer into a swirling mass.
Suppose the mass is heavy enough, the spinning glow. This is a Protostar or the first stage before a Star is Born.
Stars are self-luminous bodies of hot and glowing gas ( Hydrogen) born inside the Nebulae itself.
Our Sun is a small star. Massive stars may have a mass of at least three times that of the Sun, and some stars as massive as 50 times the Sun exist.
Stars produce energy by nuclear fusion at the core, after millions to billions of years when the Hydrogen starts running out, the core contacts while the outer portion continues expanding. The Star is now called a Red Giant.
The amount of mass of a star has determined the rest of its life cycle.
The core of low-mass stars and eventually the outer layers, which form a nebula. The body remains as a White dwarf and finally cools to become a Black dwarf.
A Massive star will undergo a Supernova explosion.
For a simple understanding, these are the seven stages of the life of a star.
- A Gaint Gas Cloud. A star begins life as a large cloud of gas.
- A protostar- Is a Baby Star.
- The T-Tauri phase
- Main sequence Stars
- Expansion into Red Giant
- The fusion of Heavier Elements
- Supernovae and Planetary Nebulae
So this is the exciting fact of the Universe and Life of the Star; in this article, I try my level best to explain all the things about the Universe and Life of the Star.
I hope you will understand and enjoy the Topic, and you got some information about the Universe. I will meet you again with a new exciting topic.
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