Essay On Star

Star formation is a rather simple process. Gasses in space clump together with dust and rock. Over millions of years these materials begin to form small orbs. Eventually it the clump will get big enough to create gravity. The core will become hot from the constant pressure and will use hydrogen to make helium using nuclear fusion. This fusions creates a tremendous amount of energy creating a fiery ball in space.

The Proxima Centauri star. And i will try to answer some of the questions about the Proxima Centauri.So that is what i will be talking about in this paragraph about the Proxima Centauri.

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

Orion has two of the brightest stars, be Betelgeuse and Rigel. Betelgeuse is a red supergiant. The gravity of the star squeezes its core tightly, heating it to billions of degrees. It then fuses the helium to make heavier elements. When that happens, the star no longer produces energy in the core. Without the reactions in its core to push outward, gravity quickly causes the core to collapse, forming a neutron star.

When observing a star, the lager it is the shorter its life is going to be. The smaller it is the longer the life. Shorter life is not saying much though, as the most massive stars live for billions of years. When a star reaches about middle age, it starts fusing hydrogen into helium. Once it has run out of usable hydrogen that it can convert into helium, it can then take on one of several paths. It can lead to white dwarfs, novae, supernovae, neutron stars or even black holes.

After the core of a star has depleted all its hydrogen in fusion, it undergoes its final stages of its life, or in other words, its death. The process path of a dying star depends on its mass. Low mass stars, from about 0.4 up to 8 solar masses will evolve from a planetary nebula to a white dwarf. Stars with larger the 8 solar masses will form supernovae, than either a neutron star for intermediate stars (8-25 solar masses) or a black hole for high mass stars (greater than 25 solar masses).

“ It is often that in the darkest skies that we see the brightest stars” quoted by Richard Evans. Stars are bright objects in space made from burning gas. As the quote says stars are seen brightest in dark areas. A star has 8 stages in its entire life it starts with the Nebula stage, then ends in a black hole. Did you know that almost all constellations have a legend?! Constellations are groups of stars forming objects or patterns in the sky. These stars that appear to look like objects or patterns are named, now how do they get their names?

You are probably wondering where did these things come from and how are they formed? Well I am about to tell you, Low mass stars are formed when all the helium has fused into carbon, then the core collapses. As the star collapses, the outer layers of the star are expelled. A planetary nebula is formed by the outer layers a massive star that will undergo a supernova explosion. Then when the low mass star is done forming after billions of years they start to become giants.

HR diagram stands for Hertzsprung-Russell diagram. It is named after the scientists that discovered a pattern between their absolute magnitude and their color. It is most commonly separated into 4 categories: Main Sequence, White Dwarfs, Giants, and Supergiants. Most stars fall under the category of Main Sequence stars.

This is a giant star that had consumed its core .helium is accumulated in the core. The star takes on a red color after a helium burning red giant run out of helium in its core the star's core starts to collapse and heat up .They are the largest known stars .They are very similar to red giants .This star is nebulosity surrounding a star’s shell or envelope of nebulosity. This star is made of dust ,hydrogen helium and more gases . It usually can be found in between planets. Originally nebular was a name for any diffuse astronomical object. The winds from this star are also responsible for producing the spectacular filamentary. This is a giant star that had consumed its core .helium is accumulated in the core. The star takes on a red color after a helium burning red giant run out of helium in its core the star's core starts to collapse and heat up .They are the largest known stars .They are very

Throughout the universe, there are dense molecular or dust clouds, known as interstellar clouds, and they are the first stage of a star. These clouds are incredibly large, containing thousands of times the mass of the Sun, and while they start out stable, for them to one day become a star, they must become unstable. Once this happens, they are no longer able to withstand their own gravity and they break into smaller pieces. The trigger for these events are still unknown, but astronomers think it is caused by some external event that forces the cloud to the next stage: cloud fragments.

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

Stars begin their life cycle as molecular clouds, or nebula. Some event, such as a shock wave or collision of a galaxy, causes the cloud to collapse and form smaller pieces, which contract inward and form a protostar. As the star

All stars are born in nebulae. Nebulae are huge cold clouds of gas and dust. The formation of protostars requires huge clouds of gas and dust collapsing under gravitational forces. The stage of a protostar last an approximate of 50 million years. As stars grow, they also expand. When the core runs out of hydrogen and helium, the contacts and outer layers of the core expand, become cold, and the brightness decreases. This is also known as a Red Giant or a Red Supergiant which mainly consists of the star’s mass. After a while of beginning the process of its death it goes through other stages.

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.