All Questions
3
questions
42
votes
3
answers
7k
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How did Hubble know the red shift difference between "moving away" and "old"?
My 9yo daughter is very into space at the moment and asked a question that my physics knowledge (6th form college, 20 years ago) is way too poor to answer.
Her space book tells us that as stars age, ...
- 521
1
vote
2
answers
258
views
How can we explain high redshift numbers?
I just finished an introductory astrophysics course$^1$ and I have a lingering question that I can't seem to resolve.
We learned that for the first few hundred million years, the universe was pretty ...
- 11
0
votes
1
answer
3k
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Redshift to calculate age of stars
In multiple articles I have seen the age of a star, within the milky way, referred to as its redshift (typically denoted by $z$). I know that $z$ can be calculated as $z=\frac{\lambda_{obsv} - \...
- 437