Stars: Building Blocks Of Galaxies

Stellar evolution stars exist because of gravity. The two opposing forces in a star are gravity (contracts) and thermal nuclear energy (expands). Stage 1 Birth is where gravity contracts the cloud and the temperature rises, becoming a protostar. Protostars are a hypothetical cloud of dust and atoms in space which are believed to develop into a star. Astronomers are fairly certain of their existence. Protostars are formed about a million years after a gas clump from an interstellar gas cloud has started

When stars died, chemicals other than hydrogen and helium formed, which led to the next level of complexity—Heavier Chemical Element. Most stars spent about 90% of their life over billions of years on during protons and hydrogen nuclei into helium nuclei. When they run out of fuel, the furnace at the center of the star stopped supporting the star, and gravity took over. Small stars did not have much pressure at the center. They burned hydrogen slowly over billions of years at relatively low temperatures. When they died, they would slowly fade away. However, great stars had so much mass that they can create enormous pressures and temperature, and when the giant stars ran out of hydrogen, the temperature got cranked up even higher, which led the star to collapse. The high temperature that the collapse caused was able to make helium nuclei fuse into nuclei of carbon. When a star used up its helium, it collapsed again, and the cycle started over. The star heated up and began to fuse carbon to form

The life cycle of the star is a long process that has taken place for billions of years and will continue to take place long after our star is no longer in existence. In this essay I will be explaining the magnificent process of how a star is first born till the end of its life cycle. First, I will be explaining how the star is first formed in all its beauty big or small. Then, I will be explaining the path of an average star like our own sun will take. After, I will be explaining the journey of a massive star in all its glory till its destructive end. All stars are first formed in clouds of gas called nebulae, turbulence deep within the nebulae causes cores to form as the mass begins to grow the nebulae begins to collapse upon itself due to

Low mass stars are like the Sun. The Sun is a perfect example of this mass. All stars start out from a place called the Stellar Nebula. The Stellar Nebula is a cloud of gas, (hydrogen, helium and other elements) with dust. When the nebula contracts,

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.

Before a star is born, massive clouds of dust and gas are pulled together by gravity in space, called a stellar nebula. These massive clouds are pulled to the center of the collapse into a number of points, or course within them. In the middle of the core, several events

when a star explodes as a supernova most of its matter is blow away into space .Is a star with a initial mass of 0.5 to 8 times that of earth’s sun .it spends most of its time on the main sequence as an orange ,yellow or blue dwarf star.all stars are little clouds of gas .it begins to collapse under its own gravity .This star is made by when the sun shucks off its outer layers it will create a beautiful shell of diffuse gas known as planetary nebula .The first planetary nebula with was discovered with a bright in 1790 .These stars are made up of dust or gas.New technology has captured a number of phenomenal images of planetary nebula in extreme depth .where scientist thought that the gaseous layers came off evenly , images from the hubble space telescope have revealed a wide array that it could be the fate of our closest star . These stars are born just like average

Stars start off as clouds of gas that are usually in the spinning “arms” of a galaxy

Stardust is known to be a part of a much larger group, called ‘cosmic dust’, which is best described as a smoke-like cloud, with varying particles spread around the area. When these particles come together, their sizes can range from a couple molecules, to 0.1 millimetres. Cosmic dust can be found everywhere in space, and starts off as stardust, but picks up remains from meteors and asteroids along the way.

Stars are born in a very complicated way. First the gravitational collapse of a cool, dense molecular cloud sends fragments into space. The fragments then contract and form stellar cores. The stellar cores then rotate and condense as they increase in temperature, to the point that a nuclear reaction occurs. The new born star burns hydrogen into helium for 90 percent of its life and is a sequence star. A star’s mass changes as it burns more hydrogen.Once there is no more hydrogen for the star to burn off of, energy generation will stop and the core will start contracting. As the internal temperature increases a shell of hydrogen gets ignited. The star begins to expand enormously and increases in luminosity. The star expands so large that if our star started to expand like this it would swallow Mercury and

The changes that occur during a star 's life are called stellar evolution. The mass of a star determines the ultimate fate of a star. Stars that are more massive burn their fuel quicker and lead shorter lives. Because stars shine, they must change. The energy they lose by emitting light must come from the matter of which the star is made. This will lead to a change in its composition. Stars are formed from the material between stars, shine until they exhaust their fuel, and then die a predictable death based upon their initial mass.

Stars are born in a Nebulae which a clouds of dust and gas (mostly hydrogen). In the stellar nurseries the dense parts undergo gravitational collapse and compress into a rotating gas globule. The globule is cooled by emitting radio waves and infrared radiation. It is compressed by gravitational forces and also by shock waves of pressure from supernova or the hot gas released from nearby bright stars. These forces cause the roughly-spherical globule to collapse and rotate. The process of collapse takes from between 10,000 to 1,000,000 years.

A galaxy, also called a nebula, consists of billions of stars, interstellar gas, dust, and dark matter which are all bound to form a massive cloud in which we live in. Although it cannot be very well explained, dark matter makes up at least 90% of a galaxy’s mass.

Indecent bodies like the sun. Stars are made up of big exploding balls of gas, mostly hydrogen and helium. The sun is similarly a star made up of huge amounts of hydrogen, undergoing a continuous nuclear reaction like a hydrogen bomb. Stars come about when vast clouds of hydrogen, helium and dust contract and collapse due to gravity. The clouds came from astronomical plasma from “The Big Bang”, but the dust comes from the supernovae of other stars.

The first star is the stellar nebula the latin word for “cloud” they are actually not a cloud but they are made of dust hydrogen and helium gas and plasma they are also called stellar nurseries as people have only scratched the surface of stellar nebulae and they are like cloudy substance and they are like a purple orange and a little blue. For centuries stellar nebulae have been mistakes for massive clouds as they do look like clouds but