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heliosphere

[ hee-lee-uh-sfeer ]

noun

, Astronomy.
  1. the region around the sun over which the effect of the solar wind extends.


heliosphere

/ ˈhiːlɪəʊˌsfɪə /

noun

  1. the region around the sun outside of which the sun's influence is negligible and interstellar space begins


heliosphere

/ lē-ə-sfîr′ /

  1. The large, roughly elliptical region of space around the Sun through which the solar wind extends and through which the Sun exerts a magnetic influence. The heliosphere extends well beyond the orbits of the planets, and its shape and extent fluctuate with changes to the solar wind and other influences.
  2. ◆ The boundary between the heliosphere and interstellar space is known as the heliopause .


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Word History and Origins

Origin of heliosphere1

First recorded in 1970–75; helio- + -sphere

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Example Sentences

These particles, coming toward us from all directions, some of them bouncing off of the inside of the heliosphere, clue scientists in on how the sun’s solar wind interacts with interstellar space as our solar system drifts around the galaxy.

Still, Opher and her colleagues believe that in-situ measurements are crucial, and propose such a probe to go out several hundred astronomical units beyond the heliosphere for the 2030s.

Eventually, the energetic neutral atoms reneutralize and radiate back in, toward the heliosphere.

This year, using data from IBEX, McComas and his colleagues were able to create a 3-D map of the heliosphere—from the inside.

The discovery of the IBEX Ribbon, which is invisible to both telescopes and the human eye, was one of scientists’ first forays into understanding more about our heliosphere—a bubble-like shield made up of solar winds.

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