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Posted: **September 6th, 2013, 5:05 pm**

I saw the rules, and it looks like a combo of 2012 & 2013 all in this year.

Syo, you're going to have one pigeon of a fun time

Posted: **September 6th, 2013, 8:44 pm**

I guess I'll join in with something moderately easy.

A quasar with redshift (z) of 0.2 may have a line in its observed spectrum of 6000 angstroms. What was the rest wavelength when it was emitted?

Posted: **September 6th, 2013, 9:06 pm**

Crazy Puny Man wrote:I saw the rules, and it looks like a combo of 2012 & 2013 all in this year.

Yeah, this means all 3 of my astro years will have been on stellar evolution, with this being the grand finale

Response to asdfqwerzzz2's question (Click to Show Hidden Text)

Emitted wavelength = observed wavelength / (1 + z) = 6000/(1.2) = 5000 angstroms

Technically, I was supposed to post a new question since I got the last one, but yeah I took forever to check this so it's cool.

Posted: **September 6th, 2013, 9:13 pm**

FawnOnyx wrote:
Crazy Puny Man wrote:I saw the rules, and it looks like a combo of 2012 & 2013 all in this year.
Yeah, this means all 3 of my astro years will have been on stellar evolution, with this being the grand finale
Response to asdfqwerzzz2's question (Click to Show Hidden Text)
Emitted wavelength = observed wavelength / (1 + z) = 6000/(1.2) = 5000 angstroms
Technically, I was supposed to post a new question since I got the last one, but yeah I took forever to check this so it's cool.

Yep! thats it. Haha my bad, though I'd just join in

Posted: **September 6th, 2013, 10:55 pm**

Let's do something more graphical!

1. Identify the DSO
2. A similar supernova remnant of the same type is observed to have a peak apparent magnitude of +14.6. Estimate its distance in Mpc.

Posted: **September 7th, 2013, 9:15 am**

Answer to FawnOnyx's Questions (Click to Show Hidden Text)

1. Tycho's SNR/B Cas. 
         2. 60.183 mpc. I got this using the Distance Modulus. Since type Ia supernovae have a consistent absolute magnitude of -19.6, we can plug it into the equation          d=10^((m-M+5)/5). After this, you divide by 1,000,000 to get the answer in MPC.

Posted: **September 7th, 2013, 2:48 pm**

Cool, your turn asdfqwerzzz2!

Posted: **September 7th, 2013, 7:39 pm**

I'm going to continue the graphical/I.D. sort of questions.

What is the name of the above deep space object and list 2 things that make it significant
(Sorry for the huge image)

Posted: **September 8th, 2013, 5:48 pm**

[hide] w49b, it would have been seen supernova-ing around 1000 AD, the nebula contains nickel and iron [/hide]

Posted: **September 8th, 2013, 6:23 pm**

alpacas wrote:[hide] w49b, it would have been seen supernova-ing around 1000 AD, the nebula contains nickel and iron [/hide]

Nice! Another thing notable that I would say is that it very well may contain our Galaxy's youngest blackhole. Your turn now, and you may want to work on your hide function.

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