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What is the heliosphere?

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  1. The Sun's glowing surface layer
  2. A bubble the solar wind inflates around the solar system
  3. The layer of air where planes fly

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References

  1. NASA Science, Basics of Space Flight, Chapter 1 science.nasa.gov/learn/basics-of-space-flight/chapter1-1 Checked 2026-10-10.

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