heliosphere
noun
he·li·o·sphere
ˈhē-lē-ə-ˌsfir 
-ō-
-ō-
: the region in space influenced by the sun or solar wind
Examples of heliosphere in a Sentence
Recent Examples on the Web
To this day, the probes are the only spacecraft in history to operate outside of the heliosphere – the protective bubble of particles and magnetic fields generated by the sun.
—
Eric Lagatta, USA Today, 8 Sep. 2025
The hope is that learning the intricacies of the solar wind can help scientists lay out the link between the sun's corona and what's known as the heliosphere.
—Monisha Ravisetti, Space.com, 14 Aug. 2025
The spacecraft is currently beyond the heliosphere, the sun’s bubble of magnetic fields and particles that extends well beyond the orbit of Pluto.
—Ashley Strickland, CNN Money, 14 May 2025
Scientific American senior news reporter Meghan Bartels follows two beloved spacecraft, Voyagers 1 and 2, on their epic tour past the outer planets, across the edge of the sun’s influence (the heliosphere) and into interstellar space.
—Jeanna Bryner, Scientific American, 18 Mar. 2025
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Eric Lagatta, USA Today, 8 Sep. 2025
The hope is that learning the intricacies of the solar wind can help scientists lay out the link between the sun's corona and what's known as the heliosphere.
—Monisha Ravisetti, Space.com, 14 Aug. 2025
The spacecraft is currently beyond the heliosphere, the sun’s bubble of magnetic fields and particles that extends well beyond the orbit of Pluto.
—Ashley Strickland, CNN Money, 14 May 2025
Scientific American senior news reporter Meghan Bartels follows two beloved spacecraft, Voyagers 1 and 2, on their epic tour past the outer planets, across the edge of the sun’s influence (the heliosphere) and into interstellar space.
—Jeanna Bryner, Scientific American, 18 Mar. 2025
See All Example Sentences for heliosphere
Cite this Entry
“Heliosphere.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heliosphere. Accessed 18 Sep. 2025.
Copy CitationKids Definition
heliosphere
noun
he·li·o·sphere
ˈhē-lē-ə-ˌsfir
-ō-
-ō-
: the region of space that is affected by the sun or solar wind
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