the study of the sun’s interior by the analysis of its oscillations and sound waves passing through it

See asteroseismology
Word Origin

helio- ‘sun’ + seismology


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    [hee-lee-uh-sfeer] /ˈhi li əˌsfɪər/ noun, Astronomy. 1. the region around the sun over which the effect of the solar wind extends. /ˈhiːlɪəʊˌsfɪə/ noun 1. the region around the sun outside of which the sun’s influence is negligible and interstellar space begins heliosphere (hē’lē-ə-sfîr’) The large, roughly elliptical region of space around the Sun through which […]

  • Heliostatic

    [hee-lee-uh-stat] /ˈhi li əˌstæt/ noun 1. an instrument consisting of a mirror moved by clockwork, for reflecting the sun’s rays in a fixed direction. /ˈhiːlɪəʊˌstæt/ noun 1. an astronomical instrument used to reflect the light of the sun in a constant direction

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    [hee-lee-oh-tak-sis] /ˌhi li oʊˈtæk sɪs/ noun, Biology. 1. movement of an organism toward or away from sunlight. /ˌhiːlɪəʊˈtæksɪs/ noun 1. movement of an entire organism in response to the stimulus of sunlight

  • Heliotherapy

    [hee-lee-oh-ther-uh-pee] /ˌhi li oʊˈθɛr ə pi/ noun 1. treatment of disease by means of sunlight. /ˌhiːlɪəʊˈθɛrəpɪ/ noun 1. the therapeutic use of sunlight

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