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
