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A star forms from massive clouds of dust and gas in space, also known as a nebula. Nebulae are mostly composed of hydrogen. Gravity begins to pull the dust and gas together. As the mass falls ...
All stars, irrespective of their size, follow the same 7 stage cycle, they start as a gas cloud and end as a star remnant. 1. Giant Gas Cloud. A star originates from a large cloud of gas. The temperature in the cloud is low enough for the synthesis of molecules. The Orion cloud complex in the Orion system is an example of a star in this stage ...
- 4 min
- Yes, stars do die once they complete their lifecycle.
- Different stages of life cycle of stars are: Giant Gas Cloud Protostar T-Tauri Phase Main Sequence Red Giant The Fusion of Heavier Elements Superno...
- This process takes place in the red giant stage.
- Nuclear fusion reaction takes place inside the star.
- Giant Gas Cloud/Nebula
- Protostar
- T-Tauri Phase
- Main Sequence
- Red Giant
- White Dwarf
- Black Dwarf
- Red Supergiant
- Supernova
- Neutron Star Or Black Hole
At the first stage of their lives, stars are formed by the gravitational collapse of giant clouds of dust and gas called Nebulae. This stage is the start of their life cycle.
A protostar is the result of the gravitational collapse of a nebula. It is the formative phase of a star. During this phase, the infant star strives to gain equilibrium between its internal forces and gravity. A Protostar starts very vastly. It can be billions of kilometers in diameter. It usually lasts for 100,000 years. During this period, the pr...
Before fusion begins, the protostar goes through a period called the T-Tauri phase. At this stage, the core temperatures are still too low for hydrogen fusion, so all the star energy comes from the gravitational forceonly. The star at this point is about the same size as a low or medium mass star. However, it is much brighter. This period can last ...
The Main Sequence signifies the portion of a star’s life where its core is capable of hydrogen fusion. 90% of a star’s life is spent in this stage. The stars in the Main Sequence are of many different masses, colors, and brightness. The amount of time a star spends on the Main Sequence depends directly upon its mass. average stars like the Sun stay...
When a star has fused all the hydrogen in its core, its nuclear radiation output ceases. As a result, the star once again starts collapsing due to gravity. The energy generated by this collapse heats the core enough that the hydrogen in the surrounding stellar atmosphere can be burnt. This process causes the star’s outer layers to expand and cool d...
Once the star’s outer layers are shed, only a tiny core comprising primarily carbon and oxygen remains. The star is called a White Dwarf. Here, the mass of an entire stellar core is condensed into a body roughly the size of the Earth. Such a small size is possible due to the pressure exerted by the fast-moving electrons. This fate is only for those...
Black dwarfs are the final stage in the life of a low to medium mass star. They are the remnants of white dwarfs, formed due to the gradual cooling and dimming as they burn their remaining fuel. Eventually, they will exhaust their fuel and keep dimming until they are no longer visible to us. This process takes such a long time that no black dwarfs ...
For stars with a mass 8-9 times that of the Sun, the core temperatures become so high that nuclear fusion can occur even after the helium is exhausted. They can swell up to truly spectacular sizes; for example, Betelgeuse, a red supergiant and the tenth brightest star in the sky, is so massive that if it were in the Sun’s place, it would stretch ti...
The moment the core of a supergiant star turns to iron, it has reached the end of its life. The star collapses instantly under the enormous gravity exerted on its heavy iron core. The core shrinks from around 5000 miles across to just a couple dozen in a matter of seconds, and the temperatures can reach 100 billion K. This collapse triggers an incr...
After a supernova explosion, all that remains of the star is its core. What happens to this core depends on its mass. a) Neutron Star:If the collapsing core is of 1.4-3 solar masses, it forms a Neutron Star. A neutron star is a highly dense, heavy, and trim body comprised of neutrally charged neutrons. The force of gravity on the collapsing core is...
Apr 11, 2022 · The first step in the process of creating stars is the formation of dense cores within a clump of gas and dust (Figure 21.1.7 21.1. 7 (a)). It is generally thought that all the material for the star comes from the core, the larger structure surrounding the forming star.
Jul 23, 2019 · When mid-sized stars, like the Sun, run out of hydrogen, their cores will contract and heat up. The outer layers of gas will expand and the stars will become red giant stars. Eventually when the core of a red giant star cools, the remaining gas will float into space, forming a planetary nebula. Each planetary nebula has a white dwarf star at ...
Stellar Evolution. Black Holes. Black Hole. Supernovae. Supernova. Eventually, the hydrogen that powers a star's nuclear reactions begins to run out. The star then enters the final phases of its lifetime. All stars will expand, cool and change colour to become a red giant or red supergiant. What happens next depends on how massive the star is.
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Aug 16, 2023 · The Formation of Stars. 1. Nebula. All stars form from a giant cloud of hydrogen gas and dust called a nebula. 2. Protostar. The force of gravity within a nebula pulls the particles closer together until it forms a hot ball of gas, known as a protostar. As the particles are pulled closer together the density of the protostar will increase.
