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When is a star formed?
Stars form when there is a sufficient concentration of interstellar gas, to begin the process of gravitational collapse into a star.
Interstellar gas clouds may collapse to form stars if they?
if they are massive enough and have sufficient gravitational force to overcome pressure forces and begin the process of nuclear fusion, which powers stars. This collapse is triggered by disturbances such as shock waves from supernovae or gravitational interactions with other clouds.
Where does a cycle of a star begin?
Stars usually begin their lives in stellar nurseries: (relatively) dense clouds of interstellar gases. Critical densities may be achieved when nearby stars go nova, at which time pockets in the nebula collapse under their own weight to form a protostar. If the mass of the protostar is sufficient, further gravitational collapse will cause the temperature and pressure in the core to rise to the point where hydrogen starts to fuse. At that point, a star is born.
At puberty the testes begin to make sperm what triggers this?
Horemones and testosterone
What causes a solar nebula to initially begin to form a solar?
A solar nebula begins to form when a cloud of gas and dust in space collapses under its own gravity. This collapse can be triggered by a nearby supernova explosion, a shockwave from a passing star, or other disturbances in the interstellar medium.
What caused the interstellar cloud to collapse?
Nebulae are massive collections of gas and dust that usually are very cool around 5-30 kelvin. These nebulae are the remains of dead stars that have long died and have had enough time to cool themselves from the original energy release of the nova or supernova that created them. As the nebula cools the particles begin to slow down and once cool enough gravity will begin to collapse the nebulae and form what is known as a protostar. This is the birth of stars, and is essential for star formation.
All-stars begin their lives as a part of what?
All-stars begin their lives as a part of a molecular cloud in space. These clouds contain gas and dust that eventually collapse and form stars through the process of nuclear fusion. The intense pressure and heat at the core of the collapsing cloud triggers the fusion of hydrogen atoms into helium, leading to the birth of a new star.
When did the Mayan civilization begin and end?
it started in 400BC and began to collapse in 900AD
How is star formation related to spiral arms?
As interstellar clouds approach the spiral arm region it helps them to begin the collapsing process and eventually form a star.
What are glowing cloud sections that will eventually become stars?
Glowing cloud sections that will eventually become stars are protostars. These protostars are clouds of interstellar gas and dust, which gradually collapse causing a hot dense core to form and evolve into a star.
What empires collapse did the middles ages begin with?
The empires that fell were the roman empire since they fell in 407 Ad
What caused the british to begin peace negotiations in Paris?
The collapse of the North ministry and the Whig takeover of the British government
