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If the spectrum of a star is blue shifted which is the star moving?
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What happen to the spectrum of a star moving toward the earth away from the earth?
If a star is moving towards Earth. The light is seen as 'blue shifted'. As we look at our sun, on the colour spectrum, black lines appear. When looking at distant stars, we can tell if they are moving away from us (Red shift) or getting closer to us (Blue shift). This is because the black lines shift to the red or blue end of the spectrum depending on which direction the star is travelling.
The more spectral lines of a star are shifted to the red end of the spectrum the?
... faster it moves away from us.
Can astronomers tell from the elements of a star what uts surface temperature is?
The temperature of a star is determined for it's colour spectrum. The hotter the star the more the spectrum is towards blue where as a cooler star has a spectrum closer to red.
Which scientist explained why binary stars change color?
Carl Vogel and Edward Pickering discovered the first spectroscopic binaries, and used Doppler's effect to explain their results. However, this question is rather confused. Binary stars do not change colour (except as part of their evolution, which happens to any star eventually). I think you may be misunderstanding what we call a spectroscopic binary. Some binary stars are close enough to us to be separable in telescopes, but many are too far away for that. One of the ways we can tell a star is binary is by spectroscopy. This does have to do with the wavelengths of light, which correspond to colours, but it is a misunderstanding to think that this involves the star changing colour. Spectroscopy involves dispersing light into a spectrum, that is spreading out the wavelengths into a 'rainbow'. When a light source is moving towards us, wavelengths are shifted towards the blue end of the spectrum and when it moves away, they are red shifted. This is called the Doppler effect. With the continuous spectrum of a star, this does not show up as a change of colour, because everything that is shifted is replaced with wavelengths from further along (the spectrum continues beyond the visible at both ends). The reason we can tell shifting happens is that there are dark lines across a stellar spectrum caused by elements in the star's atmosphere which absorb some of the emitted light. The frequencies at which these lines appear are always the same for the same element. If these lines are found at different frequencies than expected, then the source is moving. Binary stars orbit each other, so part of the time they are moving towards us and part of the time they are moving away. This results in the frequency of the absorption lines' shifting back and forward with time.
How do astronomers know which element is present where?
Emission spectra is used in the study of stars because when the lines emitted are studied, scientists are able to determine what the star is composed of. The temperature and mass of the star are also determined by the emission spectra.
If a star is moving toward Earth it is?
blue shifted
If a star is moving toward earth is it?
blue shifted
Is a star is moving toward earth it is?
blue shifted
What happen to the spectrum of a star moving toward the earth away from the earth?
If a star is moving towards Earth. The light is seen as 'blue shifted'. As we look at our sun, on the colour spectrum, black lines appear. When looking at distant stars, we can tell if they are moving away from us (Red shift) or getting closer to us (Blue shift). This is because the black lines shift to the red or blue end of the spectrum depending on which direction the star is travelling.
How do people know when a star is moving toward or away from the earth?
blue shifted
Why would the star Sirius find that its spectral lines are blue shifted?
The spectral lines of Sirius are blueshifted because the star is moving more or less toward us.
How do you know if a star is moving toward us or away?
This is determined by measuring the "red shift" or "blue shift" of the star, or in other words, whether its perceived color on earth is shifted towards the red end of the spectrum or towards the blue end. This color shift effect is similar to the Doppler effect in that it is caused by the compression or rarefaction of waves by a moving object. So a star moving away from us would look slightly more red than usual because the light waves that reach us are drawn out due to the motion of the star. And conversely, a star moving towards us would look slightly more blue than usual, for the same reason.
What is a star's emission spectrum?
The emission spectrum of a star is the spectrum of frequencies for emitted electromagnetic radiation during the transition of an atom's electrons from a high-energy state to a low-energy state. The emission spectrum can differ depending on the temperature and composition of the star.
How is the blue shift related to the lifecycle of a star?
Not at all. "Blue shift" refers to a shift of features in the star's spectrum toward shorter wavelengths, for stars that are moving toward us. It has nothing at all to do with the composition or properties of the star itself.
Is a star shifting to the red spectrum moving closer or farther from us?
If it were moving it would be moving away from our perspective. However, just because a star is shifting spectrum does not mean that it is moving; it could be entering the next stage of the star life cycle.
How does the blue shift sopport the big bang?
nice question! actually when a wave approaches an observer the wave length of the wave decrease and as it move far from us its wavelength increase. it is quiet difficult to understand so use your imagination. as the wavelenght increase the spectrum will be shifted toward red spectrum and thus called red shift. when Edward Hubble studies spectrum of different star he noticed that because of some color spectrum were missing, other spectrum got shifted to ward red. it it moved toward red then that mean that wavelength was increasing and if wavelength increases then that means light moves away from us and thus he concluded that each and every star and galaxy was moving away from each other. so blue shift doesn't support big bang. inversely, blue shift support big crunch.
The more spectral lines of a star are shifted to the red end of the spectrum the?
... faster it moves away from us.
