Solar System B

[new horizon]

my only question is how do you determine the major axis if you only have the aphelion?

*sorry aphelion

[brobo]

perihillion = at sun
aphelion = 50,000AU
Therefore, the major axis is 50,000 AU
Refer to my picture.

[new horizon]

wow i am stupid....
haha i saw the sun was the perihelion but I was like "how is that possible" so i disregarded that part
oh well, yeah you're right, but they pretty much gave you a major axis, just the question was worded weirdly.

[smarticle13]

so you do refer to kepler's third law in this question?

[bookluvr-yoyo39]

Does anyone know where you can get all the practice tests for solar system online?
can you get the questions from state and regionals so you can prepare?
sry for the many questions....

[new horizon]

there's some pretty good solar system tests on the tufts website. there a link on the very bottom of your rules, if i remember.

[bookluvr-yoyo39]

thanks so much!!!

[new horizon]

nevermind, I was looking at the rules for the wrong year.

http://www.tufts.edu/as/wright_center/p ... astro.html

there's the website

[bookluvr-yoyo39]

it's okay!! thanks though!!!

[brobo]

Does anyone know where you can get all the practice tests for solar system online?
can you get the questions from state and regionals so you can prepare?
sry for the many questions....

There are a few practice tests in the test exchange in the [wiki][/wiki]. However, people haven't been posting any, so there's only two there right now, but check back often.