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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Three cups are pointed towards the Sun to record solar wind while inside the heliosphere, while the fourth is positioned at a right angle to the others to capture information on various planetary magnetospheres, the heliosphere, and interstellar space. Andrew Paul, Popular Science, 2 Oct. 2024 Join 1 other in the comments View Comments The probe was the first spacecraft to cross the heliosphere — the sun’s bubble of magnetic fields and particles that extends beyond planetary orbits — and venture into interstellar space, or space between stars. Katie Hunt, CNN, 21 Sep. 2024 The probe operates beyond the heliosphere — the sun’s bubble of magnetic fields and particles that extends well beyond Pluto’s orbit — where its instruments directly sample interstellar space. Ashley Strickland, CNN, 16 Sep. 2024 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 See all Example Sentences for heliosphere 

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 3 Dec. 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

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