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
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The space agency's Interstellar Mapping and Acceleration Probe, or IMAP, is expected to continue its mission for two years, using scientific instruments to chart the boundaries of the heliosphere and what's going on inside of it.
—
Emily Mae Czachor, CBS News, 3 Feb. 2026
Since entering interstellar space, the craft has been studying plasma waves, cosmic rays and magnetic fields in the heliosphere, the immense bubble of solar wind around the solar system.
—George Petras, USA Today, 25 Nov. 2025
Everything within the solar wind is inside the Sun’s extended atmosphere, known as the heliosphere, which means that, in a sense, Earth orbits through the Sun itself.
—Literary Hub, 27 Oct. 2025
One of the theories postulates that the ribbon represents a group of particles that somehow leaked from the heliosphere and bounced around interstellar space before returning to the Solar System.
—Kyle Orland, ArsTechnica, 24 Sep. 2025
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Emily Mae Czachor, CBS News, 3 Feb. 2026
Since entering interstellar space, the craft has been studying plasma waves, cosmic rays and magnetic fields in the heliosphere, the immense bubble of solar wind around the solar system.
—George Petras, USA Today, 25 Nov. 2025
Everything within the solar wind is inside the Sun’s extended atmosphere, known as the heliosphere, which means that, in a sense, Earth orbits through the Sun itself.
—Literary Hub, 27 Oct. 2025
One of the theories postulates that the ribbon represents a group of particles that somehow leaked from the heliosphere and bounced around interstellar space before returning to the Solar System.
—Kyle Orland, ArsTechnica, 24 Sep. 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 16 Feb. 2026.
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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