So I don't know if this thread will even live for more than a week, but I'll try to gather some simple yet fascinating (in my opinion at least) facts about astronomy and the universe. It'll probably (not yet) be very high level complicated stuff,  but that will come later. So yeah, if anyone has some questions you can always ask and I'll see if I can help you out (of course you can help too ).
Note: throughout these derivations you may think "why is he doing that?" or "why does he discard that?". The reason is because we make a few simple assumptions that make our lives a whole lot easier. Stars, matter clouds and galaxies for example are all 'perfect spheres'; stars are only hydrogen (though that may vary depending on what I'm derivating / showing).

Gravitational Collapse:
Condition 1: The cloud is larger than its Jeans length

Condition 2: The cloud is heavier than its Jeans mass

Orbital mechanics (simple):

BTW, does any one of you have lucid dreams?
I have them rather often and it is pretty awesome

Apparently I dream a lot about the animation I'm planning to make. Then I wake up and realize I don't have such skills nor made that progress. Funny thing is in my dreams my imagination goes wild but when actually trying to work on the story I can't remember a thing or think of something good

nice, do you use it then like a stilus on it and use it for art programs? that is awesome

Yep there's a pen that you use to draw. For the art.... let's say I need a little bit more practise

Quote from: ElementCoder on April 02, 2013, 05:10:44 am

Prepare for my awesome collection of no less than five calculators! I don't have many, though I do plan on getting a TI84+SE as well I think.

Quote from: Art_of_camelot on April 02, 2013, 04:30:00 am

*edit* Also I wondered about the lab cradle. It came with my Nspire at no extra charge. I've no idea what to do with. I'd like to test it out to see if it works though. I though it was a wifi attachment when I first got it.

My Nspire didn't come with anything, not even the promised 84+ keypad . I once entered a contest which had the entire cradle/sensor set as prize, but I failed to win it.

Edit: oops, that pic came out a little bit too huge

What is that thing your calcs are lying on?

Looks like a tablet, used for digital drawing stuffs.

30xb looks pretty slick   Kind of like the fx-cp400 colors except reversed   Hard to go wrong with b/w/cyan.

Yes it's a drawing tablet, I bought it so I'd use a bit less paper so a whiteboard will be coming soon as well. I also wanted to do some digital art stuffs (I need to make some concept art for a ~15 min. short film I have planned with Blender). The 30XB looks pretty nice indeed. That's one of the reasons the second XIIB is buried underneath the first one

That TI-84 Pocket.fr just needs to be in my pocket, unfortunately I have no time to join Also is the Nspire category Basic as well as ndless?

If finding zeroes is your only goal then you can just do "nSolve(x^2+3x+4 = 0, x)" for example (without the quotes). If you want to be able to enter arbitrary values as well do the following (assuming you are on a touchpad / CX):
Go to doc>Insert>Program Editor>New, enter a name and select "Function" as the type. Press ok, you will see the following:
Func name()=

EndFunc
Now change it to the following (replacing the equation with whatever your function is):
Func name(x)=
x^2+3x
EndFunc
You can also add more variables to it, but that will unable you to plot it. To use it you simply call name(3) for example. To solve for zeroes use "nSolve(name(x)10, x)" on non-CAS or "solve(name(x)=0,x)" on CAS.

Prepare for my awesome collection of no less than five calculators! I don't have many, though I do plan on getting a TI84+SE as well I think.

*edit* Also I wondered about the lab cradle. It came with my Nspire at no extra charge. I've no idea what to do with. I'd like to test it out to see if it works though. I though it was a wifi attachment when I first got it.

My Nspire didn't come with anything, not even the promised 84+ keypad . I once entered a contest which had the entire cradle/sensor set as prize, but I failed to win it.

Edit: oops, that pic came out a little bit too huge

Did you liked it? Did you fell for it? Do you want a TI-Planet theme on Omnimaga and vice-versa? Tell us in the comments!

I said this a lot yesterday but I actually think that theme looks pretty good
I really didn't know what to expect, so when I logged in I was pretty confused, good job .