Answers

2014-02-27T17:24:56+08:00
There are many instruments used by astronomers: 
1. optical telescopes 
2. radio telescopes 
3. computers 
4. space craft 
5. magnetometers 
6. cameras 
7. photomultiplier tubes 
8. CCD arrays 
9. clocks 
10. photometers 
11. thermocouples 
12. comparators (blink microscope) 
13. spectrohelioscope/spectroheliograph 
14. coronagraph 
These are just some of them
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