plural of helioscope

plural of heliostat

(astronomy) The region of space where interstellar medium is blown away by solar wind; the boundary, heliopause, is often considered the edge of the Solar System.

Of or pertaining to the heliosphere

Of or pertaining to helioseismology.

A scientist who studies helioseismology.

plural of helioseismologist

Of or pertaining to helioseismology. / Caused by vibrations in the sun.

Describing an orbit around the Earth where each passage in the same direction along a given latitude will occur throughout the year at the same true solar time.

plural of heliosheath