The Lifecycle of a Star Essay

All over our galaxy are pockets of space, filled with dust and gas. Some of these clouds are denser than others, and every once and a while, a cloud of this gas begins squeezing together due to its own gravity. This is when a star begins to form. The cloud begins to form into a rotating disk, with the inner section rotating faster than the outer. The center will begin to heat up because of the pressure and thermonuclear reactions start in its center. Eventually, two hydrogen atoms get squeezed together with extreme pressure so that they fuse into one atom of helium, releasing a massive amount of energy, when this happens; the object is now a protostar. As the star ages, it begins to run out of hydrogen, and the star starts to spasm. It is now a subgiant. The

The stars are bright and radiant-- their numbers are vast beyond all imagination. They shine in the dark sky, like billions of little lights hanging from nonexistent threads. It is a reality that not many people stop to admire. In the city people sink down into their couches at night and drift away, eventually, to the slumber that most people crave. But the stars, shining endlessly, are there night after night, in the rain and even in the snow. If you just stop for a moment, on a night with no clouds, and look up, you will see this magnificent

- Discuss stellar evolution (describing each stage in brief). What forces are opposing one another throughout the life of a star and how do they influence the various stages in the life cycle of a star

In this paper I will explain how astronomers determine the composition, temperature, speed, and rotation rate of distant objects using various methods. I will explain the properties of stars. I will also summarize the complete lifecycle of the Sun and determine where the Sun is currently in its lifecycle.

Way out there in space, there are huge clouds of dust and gas and if one of those clouds of dust and gas is massive enough it's own gravity can causes it to start to collapse. When it collapses, it folds itself towards the center of the cloud, then it get denser and denser and hotter and hotter; eventually the particles of that gas and the dust are made up and brought so close together that they start to stick together. Then they start to fuse, thats the energy source of a star. The star switches and begins to shine. Inside every newborn star, hydrogen atoms are fused together to make helium. This process is called fusion and it creates the energy of every star. A star is a luminous sphere of gas producing its own heat and light by nuclear reactions (nuclear fusion).

I looked at my hand, while having a mental picture of a glazing star; “Stardust”, I thought, “the calcium in my bones which was made after supernova explosions.” I sat on the floor; unable to speak for an hour, and unable to stop the tears of joy and realization from rolling down my eyes.

Stars, such as our sun begin their life in an entirely different form from the one we come to recognize. Their lives begin in the bitter cold, around 10 degrees Kelvin, which is only a few degrees above the 3 degrees Kelvin temperature of the background of space itself. Their density is also extremely sparse, with a density of around 1 billion particles per cubic metre, which is only a wisp in comparison to the density of around 1410 kilograms per cubic metre that the sun like star will have during its time on the main sequence. Although they may be quite low in density, the clouds are absolutely enormous, spanning up to tens of parsecs (an astronomical unit of measurement that is determined to be around 19 trillion miles) across. In these clouds, there is an abundance of molecular and atomic gases of various types, which will serve as the rough material that will be used to create the stars and solar systems. Hydrogen is the most abundant element found within these clouds, although they can also contain many other trace elements of metals and gasses.

Stars go through phases with each one altering the star. They start as a protostar then ignite to

Mankind has always been afraid of the unknown, of the things that they cannot control. This is the case in the apocalyptic story “The Star” by H.G. Wells written in 1897. This short tale narrates the trajectory of a new star in our galaxy, and how it heads into a collision course with the sun. The star is first noticed because of its disruption in Neptune’s orbit, with whom it later collides with. Later on the narrator explains its effects when near Jupiter and this planet’s moons, and lastly, about the consequences it brings to Earth’s weather, soil and humanity while passing at a close proximity of the planet. When first discovered, only the scientific minds, specifically astronomers, were interested in such an event, while the rest of society

Stars will outlive the average human beings by about ten billion years. But stars, just like humans, go through a life cycle that adjusts to many different paths. A star is a spherical brilliant object that lies somewhere in the galaxy. The closest star to Earth is the sun. The sun is a form of heat and light that Earth receives every day. Humans need this Heat and light to survive, that is why stars are so important to the life of humans. Stars start out as nebulae and continue to form, depending on mass, into protostars, planetary nebulas, white dwarfs, black dwarfs, neutron stars or black holes.

     Stars are a marvelous wonder to many people, that is why some people spend most of their lives wondering what is “above the world so high” (Gardner 98). These people study and map the little twinkling stars in order to get a better meaning of them; they are astronomers. Great astronomers like Edwin Hubble, Immanuel Kant, and William Huggins, never stopped valuing the beauty of the stars. While they developed great astronomical principals. One astronomer who fits this mold most is, Edwin Powell Hubble. Wondering about what was

The formation of this star is determined with the size of the stellar core. For example, the black hole formed if the stellar core is larger as compared to the solar masses leading to a complete collapse of the stellar core. Black hole is dense object with strong gravity

There are many stages in the life-cycle of a star. Stars are formed in clouds of gas and dust, also referred to as a nebulae. The lifetime of a star depends on its size; if the star is massive, perhaps like the sun, it will have a shorter life-span. A star like a dwarf star, an extremely small star, will have a longer life-span. Stars begin as protostars, then go into main sequence stars, supergiants, and last but not least, the stars will become old and turn into either a white dwarf or a black hole. You may not be able to see every star in the night sky, but don’t be fooled, space is filled with gas and dust too thin to be seen by the naked eye; this gas and dust is called interstellar medium.

"When the night is dark—why, the stars are sharp-pointed, and there's quiet. Why, you rise up and up! Every pointed star gets

Since the beginning of recorded civilization, stars played a huge role in religion and proved vital to routing. The invention of the telescope, the discovery of the “laws of motion” and gravity in the 17th century prompted the