Celestial bodies are intriguing. They are some of the most interesting things that you will ever get to study. The Earth is the birthplace of the human race. We are a species capable of great things. But one of the most important questions that any person can ask is that are we the only ones here? Are we the only people who are capable of all of these things, or is it more complicated than that? The answer to this question of finding life on another planet has been something that scientists have been spending their entire lives to find for years now. 

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Celestial Bodies 

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So what exactly are celestial bodies? Why should we even study them in the first place? Why is there a need for us to find out if we are the only ones here or not? All of these questions will be answered in this article. We will be taking a deeper look into the space that surrounds our planet Earth and we will try to understand everything in detail about the celestial bodies surrounding it. Have you ever tried watching the night sky with a telescope? If yes, then you may know some of these celestial bodies that we are going to be discussing in the article. However, if you have not seen the night sky through a telescope, then try to list down the things that you would see on a normal evening from your house. Try this activity and find out how many celestial bodies you can name.

A celestial object is a naturally happening phenomenon that occurs in the observable universe. In astronomy, the words object and body are often used interchangeably. On the other hand, a celestial body is a solo, strongly bound, adjoining entity, while the celestial object is a complex, less cohesively bound structure, which may consist of multiple bodies or even other objects with substructures. Celestial bodies or heavenly groups are objects in space such as the Sun, planets, Moon, and stars. 

They form a part of the massive universe we live in and are typically very far from us. The magnificent night sky is dotted with such objects and when we see them using a telescope, they expose fascinating worlds of their own. Because they are so far away, we cannot see all of them with the naked eye and we depend upon telescopes to study them. The word celestial body is as wide as the entire universe, for both known and unknown. By definition, a celestial body is any natural object outside of the Earth’s atmosphere. Simple examples are the Moon, Sun, and the other planets of our solar system. But those are very partial examples. The Kuiper belt holds many celestial bodies. Any asteroid in space is a celestial body.

A star is a form of a celestial object made up of a shining spheroid of plasma held together by its own gravity. The nearest star to the Earth is the Sun. Several other stars are visible to the naked eye from the Earth during the night time, looking at a multitude of fixed luminous points in the sky due to their enormous distance from the Earth. Historically, the most noticeable stars were grouped into constellations and asterisms, the brightest of which gained proper tags. Astronomers have drawn together star catalogues that identify the known stars and deliver standardised stellar designations. However, it is estimated that there are over 300 sextillions (3×10²³) stars in the Universe, including all-stars outside our galaxy (the Milky Way), which are invisible to the naked eye from the Earth.

A star's life starts with the gravitational collapse of a gaseous nebula of material composed mostly of hydrogen, along with helium and small amounts of heavier elements. When the lunar core is sufficiently thick, hydrogen becomes gradually converted into helium through nuclear fusion, liberating energy in the process. The rest of the interior of the star transfers energy away from the core through a mixture of the radiative and convective heat transfer process. The interior pressure prevents it from collapsing further under its own gravity. A star with a mass bigger than 0.4 times the Sun's mass will expand to become a red hulk when the hydrogen fuel in its core is exhausted.