Save'm Star's related Questions Help Pz

  • Thread starter Thread starter mathaTon
  • Start date Start date
AI Thread Summary
Astronomers use various methods beyond telescopes to determine the composition of stars, including spectroscopy, which analyzes light absorption and emission. The presence of specific absorption lines in a star's spectrum indicates the elements present, but the absence of lines does not definitively mean those elements are absent; they may simply not be detectable under current conditions. The detection of hydrogen and helium in stars is primarily based on their strong spectral lines, which are easily identifiable. While the continuum radiation from a star's interior lacks visible features, the cooler outer layers allow for the detection of other elements through their unique absorption signatures. Understanding these concepts is crucial for comprehending stellar composition and the limitations of current detection methods.
mathaTon
Messages
11
Reaction score
0
Urgent HELP Star's related Questions!

Good Morning, I need help to answer these questions if anyone out there knows the answer for them, please shout or type (whatever u prefer :smile: )it a.s.a.p
what are the few methods astronomers use to today to find what stars are made of ? (other than telescope?)

if in the line spectrum, u see certain line, not the rest! is it correct to conclude the other elements are nt present in the star? why or whynot?
thanks anyhoo
 
Last edited:
Physics news on Phys.org
This website ought to get you started:

http://www.astro.uiuc.edu/~kaler/sow/spectra.html
 
Last edited by a moderator:
The interior of a star generally produces continuum radiation, with no visible spectral features. The absorption lines you see in stellar spectra are actually due to that continuum light passing through elements in the cooler outer layers of the star.

- Warren
 
Thankyou both, Good start for now.
 
After browsing the site, I am still unsure for the answer :
The interior of a star generally produces continuum radiation, with no visible spectral features. The absorption lines you see in stellar spectra are actually due to that continuum light passing through elements in the cooler outer layers of the star.
then how did they detected 90% hydrogen and Helium, at first place? if " "
is there any chances of them (scientists) detecting any more elements if it is not the line spectrum? (I am annoying I know, but please try to help me comprehend this, will ya?)
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

I J0524-0336, surprisingly high Li concentration
Replies
2
Views
3K
I Condition for Centering Starlight in a Water-Filled Telescope?
Replies
6
Views
2K
Solving Binary Star Systems: Doppler & Kepler's 3rd Law
Replies
6
Views
4K
Structure of the Galaxy: 6 Questions Confirmed
Replies
31
Views
4K
I Star Gravitational Binding Energy Questions
Replies
8
Views
7K
I Where can I find publicly accessible data from observatories in Europe?
Replies
5
Views
2K
B Questions about the Eddington Limit and Super - Eddington black holes
Replies
0
Views
2K
Spectrum of Stars: Explaining the Spectral Lines of Stars
Replies
2
Views
3K
Help with Doppler shift galaxy question
Replies
2
Views
2K
Why does the Sun behave like a black body?
Replies
32
Views
19K

Hot Threads

Recent Insights

Back
Top