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In the outer layers of a star, elements such as hydrogen, helium, and heavier elements like carbon, nitrogen, and oxygen absorb specific wavelengths of light. This absorption occurs due to the excitation of electrons in these elements, which absorb photons and move to higher energy levels. The resulting absorption lines in a star's spectrum provide valuable information about its composition, temperature, and density. These interactions also play a crucial role in the star's energy balance and evolution.
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Why do black lines appear on a star's absorption spectrum?
The black lines (absorption lines) in a star's spectrum are caused by elements in the star's outer layers absorbing specific wavelengths of light. These elements absorb light at certain frequencies, creating dark lines by removing energy from the incoming light. By analyzing these absorption lines, scientists can determine the elements present in the star and study its properties.
What are two possible results of a supernova explosion?
The core of the star can collapse to form a neutron star or a black hole. The outer layers of the star can be ejected into space, enriching the surrounding interstellar medium with heavy elements.
What species absorbs photons in a protostar's outer layers?
In a protostar's outer layers, hydrogen atoms absorb photons. This process triggers nuclear fusion reactions that release energy and contribute to the protostar's growth and development into a stable star.
What happens what a star has lost all of its hydrogen?
When a star exhausts its hydrogen fuel, it can no longer sustain the nuclear fusion processes that power it. As a result, the core contracts and heats up, eventually leading to the fusion of heavier elements like helium. This causes the outer layers of the star to expand, transforming it into a red giant. Eventually, the star may shed its outer layers, resulting in a planetary nebula, while the core remains as a white dwarf.
What is a large cool star form when a star runs out of hydrogen?
When a star runs out of hydrogen in its core, it starts fusing helium into heavier elements like carbon and oxygen. This process causes the outer layers of the star to expand and cool, becoming a red giant.
Why do black lines appear on a star's absorption spectrum?
The black lines (absorption lines) in a star's spectrum are caused by elements in the star's outer layers absorbing specific wavelengths of light. These elements absorb light at certain frequencies, creating dark lines by removing energy from the incoming light. By analyzing these absorption lines, scientists can determine the elements present in the star and study its properties.
What does a star become when it expands and outer layers cool?
When a star expands and its outer layers cool, it becomes a red giant. This occurs in the later stages of a star's life cycle, particularly for stars with masses similar to the Sun. The expansion is caused by the star running out of hydrogen fuel in its core and beginning to fuse helium into heavier elements.
What do the pattern of lines in a stars absorption spectrum represent?
read the Earth science book you will find the answer
What is true of the layers of a star?
the inner layers are very cool, the outer layers are somewhat cool
How is energy transferred through the layers of a star?
In a star, energy is primarily transferred through radiation in the outer layers and through convection in the inner layers. In the core, where nuclear fusion occurs, energy is generated and eventually travels outward through the layers by radiation, heating up the outer layers.
What are two possible results of a supernova explosion?
The core of the star can collapse to form a neutron star or a black hole. The outer layers of the star can be ejected into space, enriching the surrounding interstellar medium with heavy elements.
What species absorbs photons in a protostar's outer layers?
In a protostar's outer layers, hydrogen atoms absorb photons. This process triggers nuclear fusion reactions that release energy and contribute to the protostar's growth and development into a stable star.
What happens what a star has lost all of its hydrogen?
When a star exhausts its hydrogen fuel, it can no longer sustain the nuclear fusion processes that power it. As a result, the core contracts and heats up, eventually leading to the fusion of heavier elements like helium. This causes the outer layers of the star to expand, transforming it into a red giant. Eventually, the star may shed its outer layers, resulting in a planetary nebula, while the core remains as a white dwarf.
When a star has fuel left and its outer layers escape into space it is a?
It is called a nova.
What is a large cool star form when a star runs out of hydrogen?
When a star runs out of hydrogen in its core, it starts fusing helium into heavier elements like carbon and oxygen. This process causes the outer layers of the star to expand and cool, becoming a red giant.
What information does the stars spectrum offer about the star?
Mainly the temperature, and what elements are in the star's outer layers. Also, using the redshift or blueshift, how fast the star is moving away from us or towards us. For very far-away stars, this can be used to calculate its distance.
What describes how a star's life cycle end?
The star will blow out its outer layers in a huge explosion called a supernova.
