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It is a bit complicated. If I understand correctly, once the star's core runs out of hydrogen, it starts to collapse, getting hot enough to fuse helium into heavier elements. This leaves the star much hotter, and it is this heat that makes the star expand - so while the core is more compact, the larger part of the star is blown up due to the heat.
What else can I help you with?
Why do red giant stars expand?
Because they begin to run out of fuel
When stars get older do they shrink?
As stars age, they can go through a series of changes depending on their size. Smaller stars, like our Sun, will eventually expand into a red giant and then shed their outer layers to become a white dwarf, a process that doesn't involve shrinking. Larger stars may undergo a supernova explosion, leaving behind a neutron star or black hole.
How do you classify stars by age?
Stars can be classified by age based on their position in the Hertzsprung-Russell (HR) diagram. Young stars are typically located in the upper left part of the diagram (O and B type stars), while middle-aged stars like our Sun are in the middle (G type stars). Older stars are found in the lower right part of the diagram (M type stars). By analyzing a star's characteristics like temperature, luminosity, and spectral type, astronomers can estimate its age.
Does age affect the brightness of stars?
Yes, the age of a star can affect its brightness. Younger stars tend to be brighter than older stars because they are still in the process of converting hydrogen into helium through nuclear fusion, which releases a lot of energy. As stars age and exhaust their hydrogen fuel, they can become dimmer.
Are dying stars bright?
Yes, dying stars can become very bright. As they run out of nuclear fuel, some stars expand into red giants or supergiants, which can increase their brightness. Additionally, some dying stars, like supernovae, can produce intense bursts of light as they explode.
Do stars expand in size?
Stars expand in size to become red giants, when they start running low on Hydrogen fuel.
Why do red giant stars expand?
Because they begin to run out of fuel
When stars get older do they shrink?
As stars age, they can go through a series of changes depending on their size. Smaller stars, like our Sun, will eventually expand into a red giant and then shed their outer layers to become a white dwarf, a process that doesn't involve shrinking. Larger stars may undergo a supernova explosion, leaving behind a neutron star or black hole.
What happen when stars age?
As with everything, stars age as well, and reach the end of their time. As stars age, they become different types of stars, based on how big they are, and how hot they are burning. When they run out of fuel, they eventually die.
How old are the stars irregular stars?
The same age as stars in other galaxies.
What do blue stars expand to become?
Blue stars expand to become red supergiants. This expansion occurs as they near the end of their life cycle and undergo changes in their core structure leading to increased size and brightness. Ultimately, blue stars can end their lives in a supernova explosion.
Can a star be born whenever a nebula expands?
No. Stars are born when nebulae collapse, not when they expand.
What instrument was used during the Age of Exploration to observe stars?
At the Age of Exploration they used telescope to observe stars.
How did suffrage expand during the Age of Jackson?
Jacksonian democracy
Do spiral galaxies have young stars middle age stars or old stars?
It has all types of stars with different ages
Average sized stars will spend their old age as?
Red giant stars.
How do you classify stars by age?
Stars can be classified by age based on their position in the Hertzsprung-Russell (HR) diagram. Young stars are typically located in the upper left part of the diagram (O and B type stars), while middle-aged stars like our Sun are in the middle (G type stars). Older stars are found in the lower right part of the diagram (M type stars). By analyzing a star's characteristics like temperature, luminosity, and spectral type, astronomers can estimate its age.
