Hi all, In fact I have several questions, especially in satellite,space research and spacecraft. mainly i target by my questions to get the knowledge in electronics,communication and physics.so,i want to have an open discussion for my benefit and so others. 1-I want to know some details about satellite sys and hardware design,for example satellite has an antenna and solar cell wings and what else? The satellite,which is composed?What are the stages of manufacture of the satellite? 2-What is the difference between communications satellites,other NASA/scientific satellites and laser satellite? 3-What are the kinds of satellite?and what about Satellite Imaging techniques? 4-How do engineering physicist developed the satellite? 5-What about Hubble Space Telescope, is it a telescope or a satellite or both? how are the engineers devlope it?