Astro Pracs (1 Viewer)

[tunawalker]

I was wondering whether anyone could give me a hand with a few (aka most) of the astrophysics pracs I am missing.

-Identify data sources, plan, choose equipment or resources for, and perform an investigation to demonstrate why it is desirable for telescopes to have a large diameter objective lens or mirror in terms of both sensitivity and resolution.

-Present information by plotting on a H-R diagram the pathways of stars of 1, 5 and 10 solar masses during their life cycle

-Perform a first-hand investigation to examine a variety of spectra produced by discharge tubes, reflected sunlight, or incandescent filaments

Any info whatsoever, or even just a method would be greatly appreciated.

Thanks!!

 

[alcalder]

I was wondering whether anyone could give me a hand with a few (aka most) of the astrophysics pracs I am missing.

-Identify data sources, plan, choose equipment or resources for, and perform an investigation to demonstrate why it is desirable for telescopes to have a large diameter objective lens or mirror in terms of both sensitivity and resolution.

-Present information by plotting on a H-R diagram the pathways of stars of 1, 5 and 10 solar masses during their life cycle

Here is a site on the net that has a cute thing to look at this:
http://aspire.cosmic-ray.org/labs/star_life/hr_interactive.html

This would be for a star of 1 solar mass.

And this for a 1 solar mass star:
http://wind.cc.whecn.edu/~marquard/astronomy/sunlike.htm
http://cassfos02.ucsd.edu/public/tutorial/StevI.html

Here is a site that looks at stars in a cluster and shows how they "evolve" on the HR diagram. Also, in the top right corner of the screen is the HR diagram foir a massive star (I'd say at least 10 times the sun).
http://cassfos02.ucsd.edu/public/tutorial/StevII.html
http://cassfos02.ucsd.edu/public/tutorial/SN.html

And here is a site which has some links to places you can do some interactive plots. (There is one plot that is great but is it back to front - Stellar Evolution Applet.)
http://outreach.atnf.csiro.au/education/senior/astrophysics/stellarevolution_hractivity.html

I hope that helps.

AND you can google for the other stuff as well. Just put in Emission Spectrum and then follow links. Try starting at Wikipedia.