Page 17 of 18

Re: Solar System B

Posted: July 11th, 2011, 9:25 am
by Cheesy Pie
Barred irregular
Obafgkm I think
K
Summer triangle
Supermassive black hole at the center of the galaxy
Infrared? I know I failed that one...
1054 ce

Sry if I spoiled it...

Re: Solar System B

Posted: July 11th, 2011, 9:47 am
by IdahoSciGuy
Barred irregular
Obafgkm I think
K
Summer triangle
Supermassive black hole at the center of the galaxy
Infrared? I know I failed that one...
1054 ce

Sry if I spoiled it...
1. Thats what I would call them.
2. Those are spectral classes. The 5 luminosity classes I remember(at least I think), are Supergiants, Bright Giants, Normal Giants, Subgiants, and Dwarfs. I think thats them anyways, can someone confirm?
3. Yup
4. Yup
5. Yup, and I also think there is a supernova remnant somewhere in the structure as well( Its like SGT-A East or something like that)
6. Stangely enough, The thing I read said it was Infrared.
7. Yup

Re: Solar System B

Posted: July 11th, 2011, 10:21 am
by AlphaTauri
Yep, all correct, 'cept for 2. Mseq stars are luminosity class V (supergiants are I, bright giants are II, giants are III, subgiants are IV, and Mseq/dwarfs are V).

Additionally, on the Antares question, even if you didn't know the answer, you could have reasoned that since Antares is a red star, and red is the longest visible wavelength, it likely emits a large portion of its non-visible light in the next longest wavelength - infrared.

Now, did you guys answer all those without notes/google searches/other references? Because two years later, I can still do that. :P

Re: Solar System B

Posted: July 11th, 2011, 12:05 pm
by Cheesy Pie
Oh I confuse the two. And hypergiants are lum class 0.
No notes or google. And sagittarius a is the supernova remnants and stuff. Sgr A* is the black hole itself.
And main sequence is a star with an apparent relationship between temp and luminosity. (i.e. as temp increases lum does too)

Re: Solar System B

Posted: July 12th, 2011, 6:25 am
by IdahoSciGuy
I had to look up the light spectrum part, to be honest. Also, afterwards i went and double checked the Sagittarius A information i had.

Re: Solar System B

Posted: July 13th, 2011, 10:18 am
by Cheesy Pie
If books and sites from a few months ago don't count, I didn't cheat.
Some of my questions
1. What is significant about the Pistol Star?
2. At what distance does absolute magnitude equal apparent magnitude?
3. What is the nearest galaxy to Earth? (Depending on how you think of it there can be 2 different answers)
4. What's the closest quasar?
5. What is the nearest O type star (not including white dwarves)?

Re: Solar System B

Posted: August 24th, 2011, 10:07 am
by AlphaTauri
Since the board hasn't rolled over for the new season yet (*cough* mods *cough*), I'll post here in this thread:

I've finally finished my Reach for the Stars practice test that I've been working (read: slacking) on for months, and it's now up on the 2012 Test Exchange for all to see and use. I'll have an answer key up eventually, once I triple-check everything and verify answers with my guinea p- er, willing helper.

Feel free to PM me with any specific questions, comments, concerns, corrections, complaints, etc.

Re: Solar System B

Posted: August 25th, 2011, 11:20 pm
by ReBobville
So.

What did you all think of this year's nats test?

We thought it was easy. Yet somehow we got 30th????
What were some highlights of the test? Was it themed again this year?
Unlike last year's test, pretty much no geology.

The test was split up into 3 parts: 1) Resonance lab, 2) Reading comprehension, and 3) short answer.

there was no major theme but part 1 had 4 "plates", aka images to read.

the short answer part was basic questions like "The search for planet X was initiated because of which planet's gravitational attraction", etc. (I think i actually combined 2 questions there :P)


me and my partner split up to do parts 1 and 2 I did 2 and called it English olympiad. definitely easier then last years test
(got 2nd yay!)

Re: Solar System B

Posted: August 26th, 2011, 8:48 am
by fishman100
Congrats, we got 30th :P

There was this one question that I didn't really know the answer to; do you remember what you put? The questions was something like "what is something smaller than an asteroid called?"...along the lines of that.