Celestia Forums

gee... i dont know that this debate has been here for ages... wew... it looks like we humans are very afraid for things we didnt understand so much... well... thanks... i think this nice papers will shut my friends mouth (he keeps claiming, i keep attacking, now i sure i will win - man, what a bad b...

One of my friend (that once entered my province physics Olympic team) said that a certain CERN experiment that will conducted this August to explain the nature of big bang could cause a cascade of event that leads to formation of microblackhole and causing Doomsday... knowing it is irrelevant i try ...

thanks to mr. selden and mr. ajtribick well it seems that i really need to read more books... but in my country (Indonesia to more be more specific) there are not so much book about astrophysics, most of them is about "how to become rich fast" books and love novel so i had a shortage on ph...

thanks :D there some more question pop out in my tiny brain... if we ignoring all the tidal forces is there a way to calculate the rotation period??? or we just make up the number? and why giant gas planet tend to rotate faster than rocky ones??? is it connected to inertia??? and what make a planet ...

If we assume that there is a planet with X gravity, how high the athmosphere should be??? and how high the clouds forming??? is there is formula to calculate how high the athmosphere??? I recall that it depend on escape velocity and the molecular mass of athmospheric components, but i can't figure i...

i had read the wikibooks....
but i can't fuigure it out...
i not so good at physic...
maybe a simple formula of calculating orbital (revolutional) period and rotation period of planet with X mass orbiting a star with X mass with semimajor axis X km...

thank you mr. selden. i try to read the wikibooks.
hmm... i wonder if there is a program that can calculate the orbital and rotation period of certain planet with a certain mass...

Greetings Forum... I just wanna to ask... If we assume that a certain star has a mass of: M and there is a certain planet orbiting it at X A.U. or km, and has a mass of: m. How can we calculate it's orbit period (the time the planet need to complete it's circling the parent star) ???? and How can we...