What caused the first stars to form quizlet? Hydrogen and helium gas in these clouds formed the first stars. Supernova explosions from the first stars kept much of the gas from forming stars. Leftover gas settled into a spinning disk due to the conservation of angular momentum.
Likewise, What happens when a star becomes a supernova quizlet?
After a Supernova the star will become a Neutron Star, giving off very little light. If it is big enough the Star could collapse in on it self making it a Black Hole.
Thereof, What caused the first stars to form? Over time, gravity slowly shepherded the densest regions of hydrogen gas into compact clouds, which ultimately collapsed to form the first stars. When these primordial stars first began shining within the pitch-black void, they blasted the surrounding hydrogen gas with ultraviolet radiation.
When and how did the first atoms form quizlet?
After 300,000 years, nuclei began to capture electrons and form the first atoms. As matter was drawn together by gravity, the first stars and galaxies were born. the first matter was created but, for thousands of years, the Universe was dominated by radiation.
Where is star formation most likely to occur in our galaxy quizlet?
The clouds and interstellar gas and dust. Where does most star formation occur in the Milky Way galaxy today? In the spiral arms.
What happens when a star becomes a supernova?
This collapse produces the explosion we call a supernova. Supernovae are so powerful they create new atomic nuclei. As a massive star collapses, it produces a shockwave that can induce fusion reactions in the star’s outer shell. These fusion reactions create new atomic nuclei in a process called nucleosynthesis.
What happens during the main sequence phase of a star quizlet?
During its ‘main sequence’ period of its life cycle, a star is stable because the forces in it are balanced. The outward pressure from the expanding hot gases is balanced by the force of the star’s gravity. … The explosion from a star forming a supernova throws dust and gas into space.
What happens before a star explodes as a supernova?
In the massive star case, the core of a massive star may undergo sudden collapse, releasing gravitational potential energy as a supernova. … This drives an expanding shock wave into the surrounding interstellar medium, sweeping up an expanding shell of gas and dust observed as a supernova remnant.
What happened to the first stars?
It took perhaps 100 million years to form the very first stars in the Universe, but just another million or two after that for the most massive among them to die, creating black holes and spreading heavy, processed elements into the interstellar medium.
How did the first galaxies and stars form?
One says that galaxies were born when vast clouds of gas and dust collapsed under their own gravitational pull, allowing stars to form. The other, which has gained strength in recent years, says the young universe contained many small “lumps” of matter, which clumped together to form galaxies.
What formed first stars or galaxies?
The first stars did not appear until perhaps 100 million years after the big bang, and nearly a billion years passed before galaxies proliferated across the cosmos. Astronomers have long wondered: How did this dramatic transition from darkness to light come about?
When and how did the first helium nuclei form quizlet?
Hydrogen and helium nuclei were formed in the universe through a process called nucleosynthesis. Deuterium (a hydrogen isotope) nuclei were formed when protons and neutrons combined. Neutrons combined with deuterium nuclei to form tritium. A proton would then fuse with tritium to form helium nuclei.
What is the horizon problem in cosmology?
The Horizon Problem: Distant regions of space in opposite directions of the sky are so far apart that, assuming standard Big Bang expansion, they could never have been in causal contact with each other. This is because the light travel time between them exceeds the age of the universe.
What does the Sloan Digital Sky Survey do quizlet?
The Sloan Digital Sky Survey uses: the largest telescope ever built to map the entire sky in great detail. … If the universe has infinite time and space, there would be an infinite number of stationary stars, making the night sky bright, which is not the case.
How would you expect a star that formed recently in the disk of the galaxy to differ from one that formed early in the history of the disk?
How would you expect a star that formed recently in the disk of the galaxy to differ from one that formed early in the history of the disk? It should have a higher fraction of elements heavier than hydrogen and helium.
In which of the following is star formation most likely to occur?
Star formation happens best in great (molecular) clouds of gas and dust, which have a lot of dust particles. Infrared radiation can penetrate the dust but visible light cannot.
In what type of galaxy would you find star formation more likely in?
Spiral galaxies like our own Milky Way are studded with cold clouds of hydrogen gas and dust, like chocolate chips in a loaded Toll House cookie. Astronomers have long focused on these so-called molecular clouds, suspecting that they are hotspots for star formation.
What will happen when all the stars burn out?
Gravity will have won, a victory delayed by the ability of stars to call on the resources of nuclear fusion. But ultimately, gravity will reduce all stars to a super-dense state as black holes, neutron stars or cold white dwarfs.
What happens when a star burns out?
Stars die because they exhaust their nuclear fuel. … Once there is no fuel left, the star collapses and the outer layers explode as a ‘supernova’. What’s left over after a supernova explosion is a ‘neutron star’ – the collapsed core of the star – or, if there’s sufficient mass, a black hole.
What happens when a star explodes?
A supernova can shine as brightly as an entire galaxy of billions of “normal” stars. Some of these explosions completely destroy the star, while others leave behind either a super-dense neutron star or a black hole — an object with such powerful gravity that not even light can escape from it.
What is the first stage of a star’s life quizlet?
The stages of a stars life cycle are main sequence, red giant and white dwarf. Stars start out with a nebula, which is a large cloud of gas and dust that soon collect into a star. This causes the first and longest stage of a stars life, the main sequence.
What happens during the main sequence stage of a star’s life?
When the protostar starts fusing hydrogen, it enters the “main sequence” phase of its life. Stars on the main sequence are those that are fusing hydrogen into helium in their cores. … Eventually the core of the star runs out of hydrogen. When that happens, the star can no longer hold up against gravity.
Which stage is the first stage in which the star is stable?
Hydrogen fusion
The star thus evolves rapidly to a stable state, beginning the main-sequence phase of its evolution. A new star will sit at a specific point on the main sequence of the Hertzsprung–Russell diagram, with the main-sequence spectral type depending upon the mass of the star.
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