是否有可能在Windows和Linux中使用Cocoa进行开发？

I'm starting to learn Objective-C and I don't have a Mac (and I don't have plans to get one), but as I see that Cocoa is a very good framework to develop in Objective-C, I want to know: Is it possible to develop using Cocoa in Windows and Linux?I'm starting to learn Objective-C and I don't h