Astronomy

[Flavorflav]

Please explain.

You have actual V from #15, so you just find apparent V from redshift. Apparent V is going to be Vaway or Vx, so Vx/v = cos inclination. I think.

[Glacierguy1]

How did you get #15, because I think it is just a coincidence that I was a factor of 2 off from the right answer.

[Flavorflav]

2 pi A/P

[Glacierguy1]

Thanks...

When I first did the problem, I did it using that method, but, being spacy and such I decided to do area of the circle instead of circumference, so I got a velocity that would cause the stars to convert all of their mass into energy.
The answer of 109 that I got the other times was the recessional velocity of the star that I should have gotten for the second problem.

[Flavorflav]

Thanks...

When I first did the problem, I did it using that method, but, being spacy and such I decided to do area of the circle instead of circumference, so I got a velocity that would cause the stars to convert all of their mass into energy.
The answer of 109 that I got the other times was the recessional velocity of the star that I should have gotten for the second problem.

But how would you get that? From the wavelength data in question 16?

I'm still troubled by that one, BTW. My answer for the first one is smack in the middle of the accepted range, so I'm pretty confident in it. My answer for the second one is all the way at the bottom of the accepted range, indicating I may have got lucky. I think I'm doing it right, though - what do you get for #16?

[tad_k_22]

60 degrees is the one right answer if you take away the error ranges.

[Flavorflav]

60 degrees is the one right answer if you take away the error ranges.

DOH! I was using the wrong value for C! I get 60 now, too.

[EastStroudsburg13]

So does Astronomy involve any star/constellation identification like Reach for the Stars?

[Flavorflav]

Theoretically no, although there3 is some DSO identification, and you may have to ID stars from light curves. Also, sometimes you get an event writer who doesn't follow specs - then, who knows what you will see.

[Glacierguy1]

At my state test last year, which used a quite weird cartoon theme, said that Cruella de ville found this spot pattern on a dalmation and noted that it looked like a constellation, she also recognized [one of the DSOs]. What constellation was it. They also asked it in reverse, giving us the constellation name and asking which DSO was in it.

They usually only ask you to identify the DSOs from pictures and what constellation the DSOs are in.