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Subject
- observational astronomy13
- space observatories[remove]13
- photometry6
- ccd photometry4
- variable stars3
- infrared photometry2
- late-type stars2
- magnetic fields2
- x-ray sources2
- a stars1
- astronomical models1
- astronomical reference materials1
- comets1
- dwarf stars1
- f stars1
- galaxies1
- galaxy clusters1
- giant stars1
- infrared astronomy1
- interstellar medium1
