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Hello folks, I was shopping for some books through Amazon.com and found some game developement books for both mathematics and physics (3D graphics programming)? I already have physics, aerodynamics, and astrodynamics books. Physics for Game Programmers by Grant Palmer Physics for Game...

Thanks for some interesting articles that I need for my future programming. I was looking for some info some time ago when go deep below surface like mine, etc. At center of mass, there is zero gravity (all directions from graviational effects). From surface to the center, gravity is...

Tblaxland, For just curious, what happened to objects when you place them within 120cm hill sphere inside the space shuttle? Tim

Hill sphere Hello folks, Ok, thanks for some replies. I read some info about hill sphere. I have another question for you about that. When space shuttle is going away from the planet earth, hill sphere is becoming bigger. Right? I noticed another interesting something that you mentioned...

Ok, Thanks for additional info about other effects than microgravity effect like atomsphere drag, etc. For more information about microgravity that I explained earlier, check en.wikipedia.org/wiki/Weightlessness. Andy44 mentioned that "You'd have to have a pretty long and cavernous vehicle to...

Hello folks, I researched for zero gravity through Internet and learned something about microgravity effect within spacecraft. Interesting statement explained that objects will slowly "fall" toward denest part of spacecraft like wall, etc. When it hit, it will have own weight itself. It called...

How about motion acceleration? Ok, thanks for info. I looked into that chapter. How about motion calculation like acceleration? For example, I set small object with zero speed/direction, it would accelerate into the planet as free fall. With some speed/direction setting for spacecraft, it...

Hello folks, I still am looking for orbital determination formula with specific speed and direction around massive object (planet) for spacecraft, etc. For example, I set a vector of speed and direction with small object like spacecraft, what does that happen with orbit around massive object...

Check http://www.asterism.org/tutorials/tut22-1.htm for more information. I found formula for hill sphere: Rh = a(m/3M)^1/3. Yes, when further away from Earth or Sun, that is possible to orbit shuttle. I have a question for you. Is it possible to orbit inside shuttle within its hill sphere...

Hello, folks... Hmmm. Interesting. I checked Phobos and Deimos on Wikipedia. It said that velocity escape is 11.3 m/sec for Phobos and 5.6 m/sec for Deimos. Also surface gravity (Phobos) is around 8.4 to 1.9 mm/sec^2. For small asteroids, you can jump into orbit yourself. :-) Also, I heard...

Hello folks, Ok, thanks for many replies about gravity. I have two questions for you... I have a question about orbit with small objects like hammer, golf ball, etc.. In space, can tiny objects (some inches to 3-4 feet diameters) like hammer, ball, etc. orbit each others? Is that possible to...

Yes, I got it. I checked web site about 'normal force'. Oh, I see. I now mean centrifugal force. Thanks again. Tim

G-force Well, I now understand it. I searched for more information and found some information at wikiepdia web site. There are two forces - gravity force and normal force. When I rode roller coastor, I rode through a loop. At top of loop, normal force cancels some gravity effects. At top of...

More questions... Ok, thanks for some replies. I reviewed that web site and found about weight equations that using gravity formula (F = GMm/r^2). It can tell my weight on Earth or other planets by using my body mass. For jumping over the pole on different planets, what is that formula? How to...

Hello folks, I am learning some from my Astrodynamics books myself. I have some questions about gravitational force. I still am figuring out about mathematics for n-body alogrithms, etc. for gravity simulation because I am new to vector math. With my search through google, I had seen some...