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that sounds right to me sory about the confusion i know what it is but its a bit hard to explain "in any direction except along the path of the original light beam" why cant it be re-emited in the same direction?

are caused from nebula between the star and our observation point. The energy which is contained in the light exites electrons in the nebula, causing them to jump to a higher energy band. as this energy is lost from the light that we recieve, dark lines apear on the spectrum depending on what...

if its not in tha sylubus they not allowed to ask it i have never heard of either of their laws even tho i might no what they are you have still got a few weeks to sumarise im sure ull do fine just get a few lines for each of the dot points n u should do fine :) where u from?

It's the sodium which produces the dark or 'd' lines. Put a Na spectrograph on top of the Sun spectrograph and you get a continuous spectra. wtf was Zarathustra on about? dark lines are caused from nebula between the star and our observation point. The energy which is contained in the light...

the reason you can detect some wavelengths from space and not from earth is because the earth's atmosphere absorbs some of the wavelengths. it is suposed to stop radiation from our own sun affecting us, but also means that we cannot detect measurements from other stars from within our atmosphere

1) stars in younger clusters tend to be mostly on the main sequence, with the more massive stars branching off to the right ie red/supergiants the age of the cluster can also be determined by the age of the highest star remaining on the main sequence. 2) characteristics of different stars can...