a telescope

to use / to employ / to make use of, to apply / to spend

observation

observe

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

star

Alternative spelling of ぼうえんきょう座 (“Telescopium”)

use one thing for many purposes / work someone hard