You can learn more about MRI at this site . Machine guns are really clever. The original single-barreled machine gun used its own recoil energy to keep firing. The force of the fired bullet ejected the spent cartridge and loaded the next. All visible artificial satellites do not travel from west to east.
Many polar satellites occupy low orbits so are visible and travel north-south.
For more information on satellites you can look at the Windows satellite page. What is the most powerful telescope you have there. Here at the University of Michigan, we have a 0.4 meter reflecting telescope. What is an infrared spectroscope and how does it work. I think maybe you are looking for information on an Infrared Spectrometer .