Astronomy
- EastStroudsburg13
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Re: Astronomy
I got 3rd at regionals, and it was pretty much me that did a lot of the work. The biggest problem I had was trying to relate apparent and absolute magnitude to things like distance and luminosity. How would you figure that out?
My next problem was the Julian Calendar. How do the dates work for that?
My next problem was the Julian Calendar. How do the dates work for that?
Last edited by EastStroudsburg13 on March 17th, 2009, 12:46 pm, edited 1 time in total.
East Stroudsburg South Class of 2012, Alumnus of JT Lambert, Drexel University Class of 2017
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Re: Astronomy
There is an excellent source out there,
Click on this website it will give you all the mathematical relations that you need to know
http://scioly.org/w/images/c/c6/Formula_Sheet.pdf
The julian date
http://aa.usno.navy.mil/data/docs/JulianDate.php
Click on this website it will give you all the mathematical relations that you need to know
http://scioly.org/w/images/c/c6/Formula_Sheet.pdf
The julian date
http://aa.usno.navy.mil/data/docs/JulianDate.php
Washington DC Nationals - 2008
Astronomy 27th
Fermi Questions 21st
Team 16th
Augusta Nationals-2009
Astronomy 18th
Technical Problem Solving 4th
Team 25th
Astronomy 27th
Fermi Questions 21st
Team 16th
Augusta Nationals-2009
Astronomy 18th
Technical Problem Solving 4th
Team 25th
- EastStroudsburg13
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Re: Astronomy
I actually printed that out and put it in my binder. I couldn't find the specific fourmula for apparent/absolute magnitude.celtics09 wrote:Click on this website it will give you all the mathematical relations that you need to know
http://scioly.org/w/images/c/c6/Formula_Sheet.pdf
The Julian Date makes sense now, thanks!
East Stroudsburg South Class of 2012, Alumnus of JT Lambert, Drexel University Class of 2017
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Re: Astronomy
What did they give you in the "apparent/absolute magnitude problem"
SAVE OUR GLACIERS.
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Re: Astronomy
[quote="EASTstroudsburg13"]
I couldn't find the specific fourmula for apparent/absolute magnitude.[quote]
Are you stating that you don't want merely ratio formulas which compare such things like two star's luminosity's to their distances...?
Well, there are several different formulas that you can use to find apparent magnitude and absolute magnitude without having to rely on information about another star.
Of course, there is the one we should ALL know:
m - M = 5log(d/10), where d is in parsecs. So if you know distance and a type of magnitude, you can find the other magnitude.
Now, SPECIFIC formulas for magnitude are a little weirder. First, there is this one relating absolute magnitude to period (in days):
M = -2.81log(P) - 1.43 (just for Cepheids). This comes from the period-luminosity relationship and some guy saying that this the relationship between them.
There is also this formula relating luminosity and abs magnitude:
L = 3.362 x 10^((140-2M)/5).
Are these the sort of things you are looking for??
I couldn't find the specific fourmula for apparent/absolute magnitude.[quote]
Are you stating that you don't want merely ratio formulas which compare such things like two star's luminosity's to their distances...?
Well, there are several different formulas that you can use to find apparent magnitude and absolute magnitude without having to rely on information about another star.
Of course, there is the one we should ALL know:
m - M = 5log(d/10), where d is in parsecs. So if you know distance and a type of magnitude, you can find the other magnitude.
Now, SPECIFIC formulas for magnitude are a little weirder. First, there is this one relating absolute magnitude to period (in days):
M = -2.81log(P) - 1.43 (just for Cepheids). This comes from the period-luminosity relationship and some guy saying that this the relationship between them.
There is also this formula relating luminosity and abs magnitude:
L = 3.362 x 10^((140-2M)/5).
Are these the sort of things you are looking for??
Out of 32 teams at state:
1st Astronomy
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8th Chem Lab
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1st Astronomy
7th Physics Lab
8th Chem Lab
8th Tech. Problem Solving
- EastStroudsburg13
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Re: Astronomy
OK, that sounds like it would have helped. I don't remember the exact questions though, and our region doesn't make the tests public (I don't think).
East Stroudsburg South Class of 2012, Alumnus of JT Lambert, Drexel University Class of 2017
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Help!
Hi guys,
It's obvious y'all know what you're talking about. I, however, do not know a thing about astronomy except for how to find the Big Dipper and Orion. Somehow, I was signed up for Astronomy. Now, with two weeks before the competition, I am realizing I need some major help! Any tips?
It's obvious y'all know what you're talking about. I, however, do not know a thing about astronomy except for how to find the Big Dipper and Orion. Somehow, I was signed up for Astronomy. Now, with two weeks before the competition, I am realizing I need some major help! Any tips?
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Re: Astronomy
It's probably a good idea to check out the scioly.org Astronomy wiki (look under "Board Index"). It's also a good idea to look up and take notes on each of the topics on the rules sheet (since you're allowed to take either a binder or laptop, put your notes on there). Good luck!
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