heliosphere

noun

he·​li·​o·​sphere ˈhē-lē-ə-ˌsfir How to pronounce heliosphere (audio) -ō- How to pronounce heliosphere (audio)
: the region in space influenced by the sun or solar wind
heliospheric
ˌhē-lē-ə-ˈsfir-ik How to pronounce heliosphere (audio)
-ˈsfer-
-lē-ō-
adjective

Examples of heliosphere in a Sentence

Recent Examples on the Web Passage through one cloud in particular, located in the Lynx constellation, might have sent the heliosphere out of whack. Christian Thorsberg, Smithsonian Magazine, 14 June 2024 Both are in interstellar space and the only spacecraft to operate beyond the heliosphere — the sun’s bubble of magnetic fields and particles that extends well beyond Pluto’s orbit. Ashley Strickland, CNN, 18 June 2024 Typically, Earth and all our solar system’s planets are enveloped in a protective, giant bubble of plasma from the sun known as the heliosphere. Christian Thorsberg, Smithsonian Magazine, 14 June 2024 Inside the heliosphere, space is dominated by particles of the solar wind, while outside of it, cosmic rays reign. Meghan Bartels, Scientific American, 14 June 2024 The storied spacecraft is exploring the outermost edge of the Sun’s domain, combining its observations with data from newer missions to get a better understanding of how the heliosphere interacts with interstellar space. Passant Rabie / Gizmodo, Quartz, 23 Apr. 2024 Both are in interstellar space and are the only spacecraft ever to operate beyond the heliosphere, the sun’s bubble of magnetic fields and particles that extends well beyond the orbit of Pluto. Ashley Strickland, CNN, 14 Mar. 2024 Unaffected by electromagnetic fields, these uncharged particles continuously drift into the heliosphere. Diane Hope, Ars Technica, 12 Dec. 2023 One remaining uncertainty is where and when New Horizons will be able to collect critical data at a key location: upon its exit from the heliosphere. Diane Hope, Ars Technica, 12 Dec. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'heliosphere.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

helio- + -sphere

First Known Use

1967, in the meaning defined above

Time Traveler
The first known use of heliosphere was in 1967

Dictionary Entries Near heliosphere

Cite this Entry

“Heliosphere.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heliosphere. Accessed 15 Jul. 2024.

Kids Definition

heliosphere

noun
he·​li·​o·​sphere ˈhē-lē-ə-ˌsfir How to pronounce heliosphere (audio) -ō- How to pronounce heliosphere (audio)
: the region of space that is affected by the sun or solar wind

More from Merriam-Webster on heliosphere

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