How old are stars in galaxy?
The average age of all the galaxies that we can calculate with are roughly 14 billion, but they could be as old as a few billion or as old as many billions.
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Within a galaxy, stars can range in age from a few million years to as old as 13.8 billion years, or nearly the age of the universe, for some stars (like those in our Milky Way galaxy).
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
- What is the comparison between a white dwarf and a neutron star? Which of these stellar corpses is more common? Why?
- If a quasar is an extreme emission of light, what is actually creating the light?
- Since quasars are radio sources, but highly red shifted, what actual frequencies were originally emitted?
- What is the definition of a high mass star?
- Why can astronomers conclude that star formation is occurring in regions like Orion Nebula?

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