what are the stages in the formation of a star?
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Stage 1- Stars are born in a region of high density Nebula, and condenses into a huge globule of gas and dust and contracts under its own gravity. This image shows the Orion Nebula or M42 . Stage 2 - A region of condensing matter will begin to heat up and start to glow forming Protostars.
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The stages of mitosis are prophase, prometaphase, metaphase, anaphase, and telophase. Prophase - Mitosis begins with this stage. In this stafe, chromosomes recruit condensin and begin to undergo a condensation process that will continue until metaphase.
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White dwarfs are formed from the collapse of low mass stars, less than about 10 time the mass of the Sun. This star loses most of its mass in a wind, leaving behind a core that is less than 1.44 solar mass. On the other hand, neutron stars are formed in the catastrophic collapse of the core of a massive star.
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Supernova Explosions When most of a star's atoms become iron atoms, it becomes what is known as a supernova. It explodes, showering space with iron, oxygen and carbon atoms far and wide. From here, gravity takes over, forming the atoms into planets such as Earth.
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Astronomers classify stars according to their physical characteristics. Characteristics used to classify stars include color, temperature, size, composition, and brightness. Stars vary in their chemical composition.
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Stars are made of very hot gas. This gas is mostly hydrogen and helium, which are the two lightest elements. Stars shine by burning hydrogen into helium in their cores, and later in their lives create heavier elements.
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['step one(4) -The solar nebula consisted of. -hydrogen, ... ', 'step two(2) -A disturbance. ... ', 'step three(2) -The solar nebula assumed a flat, disk shape. ... ', 'step four(2) -Inner planets began to form from metallic. ... ', 'step five(2) -Larger outer planets began forming from fragments.']
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Stars are made of very hot gas. ... Stars shine by burning hydrogen into helium in their cores, and later in their lives create heavier elements. Most stars have small amounts of heavier elements like carbon, nitrogen, oxygen and iron, which were created by stars that existed before them.
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The most widely accepted theory of planetary formation, known as the nebular hypothesis, maintains that 4.6 billion years ago, the Solar System formed from the gravitational collapse of a giant molecular cloud which was light years across. Several stars, including the Sun, formed within the collapsing cloud.
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First, stars fuse hydrogen atoms into helium. Helium atoms then fuse to create beryllium, and so on, until fusion in the star's core has created every element up to iron. Iron is the last element stars create in their cores, and a kiss of death for any star with the the mass to make it to this point.
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Stellar black holes form when the center of a very massive star collapses in upon itself. This collapse also causes a supernova, or an exploding star, that blasts part of the star into space. Scientists think supermassive black holes formed at the same time as the galaxy they are in.
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Stars are born in giant, cold clouds of gas and dust called nebulae. A star is born once it becomes hot enough for fusion reactions to take place at its core. Stars spend most of their lives as main sequence stars fusing hydrogen to helium in their centres.
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In some nebulae, stars form out of large clouds of gas and dust; once some stars have formed inside the cloud, their light illuminates the cloud, making it visible to us. These star formation regions are sites of emission and reflection nebulae, like the famous Orion Nebula shown in the picture on the right.
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In this process, four protons fuse using carbon, nitrogen and oxygen as catalysts. Stars can emit energy as long as they have hydrogen fuel in their core. Once this hydrogen runs out, the fusion reactions shut down and the star begins to shrink and cool.
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['It must orbit a star (in our cosmic neighborhood, the Sun).', 'It must be big enough to have enough gravity to force it into a spherical shape.', 'It must be big enough that its gravity cleared away any other objects of a similar size near its orbit around the Sun.']
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The star is now on a stage of its life called the main sequences phase and is thus called a main sequence star. This is the longest phase of the star's life and all the energy the star emits comes from the nuclear conversion of hydrogen to helium in its core.
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The creative process can be divided into 4 stages: preparation, incubation, illumination, and verification. In the first stage, your brain is gathering information.