/sci/ - Science & Math

Gonna be really vague here. A while back I saw a formula somewhere, if memory serves correctly, relating to gravity. It stated with s= 1 or 2 / 1 or 2 numbers. There may have been an exponent or two in there as well. By any chance would someone happen to know what I'm talking about?

Hi /sci/, mathfag here

excuse any non scientifically correct terminology here (and hopefully any idiotic questions), but I have a few questions:

-Electricity causes a red glow when it's passed through neon, so if an atmosphere had a considerable concentration of neon in it, would lightning appear red?

-Is neon a breathable gas, or does its full outer shell electron configuration prevent this?

http://www.huffingtonpost.com/2013/02/06/earth-like-planets-are-ri_n_2632324.html

Closest earth like planet discovered is 13 light years.

The chances of us meeting another civilization keeps growing, when will it happen /sci/?

Also how long would 13 light years take with our current technology under the best circumstances. Regardless of whether or not a human were on board?

pic unrelated

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hey /sci/
please give me some quadratic equations to do or a site, where I can find plenty of them.
I'm in 9th grade, bored and I like math

derp

http://www.youtube.com/watch?v=kx9_QaU1-ng