How to implement earth and sky

[Vadood]

I know that this may be more related to computer graphics, rather than OpenGL but many people may be able to answer my question here.
I want to animate a simple object using OpenGL and I have written the code and it does well. Now I want to show some background like ground and sky, but I do not know how to do this. http://www.opengl.org/discussion_boards/ubb/frown.gif

Vadood Etminan

[tinman]

there are lots of ways to implement a ground and sky...

...for the ground, you can simply use a textured quad...

...and for the sky, you can try a "skydome" or "skybox"...try searching in google or something...

Tin