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Pronunciation varies by accent · noun
(astronomy) A zone between the termination shock and the heliopause, in the heliosphere, at the outer border of the Solar System, where the solar wind is dramatically slower than within the termination shock..
We encroach deeper into the furthest extent of the heliosheath, which thins out all the time.
Use heliosheath when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Heliosheath means (astronomy) A zone between the termination shock and the heliopause, in the heliosphere, at the outer border of the Solar System, where the solar wind is dramatically slower than within the termination shock..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
We encroach deeper into the furthest extent of the heliosheath, which thins out all the time.
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