an instrument for observing the sun without injury to the eyes
Crossword Clue

  • We have found 5 answers to crossword clue "an instrument for observing the sun without injury to the eyes"
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AnswerCrossword Clue
helioscopean instrument for observing the sun without injury to the eyes
helioscopesHELIOSCOPE, an instrument for observing the sun without injury to the eyes
pyrheliometricrelating to measurement by pyrheliometer, an instrument for measuring the heating effect of the sun
heliostatan instrument using a mirror to reflect sunlight in a fixed direction, used for studying the sun or signalling messages
heliostatsHELIOSTAT, an instrument using a mirror to reflect sunlight in a fixed direction, used for studying the sun or signalling messages