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Earth's radio bubble
Sphere of radio signals from Earth expanding at light speed since early broadcasts. About 100 light-years in radius as of the mid-2020s, and still growing.
Shown at true light-year scale around the Sun. The shell grows by about one light-year per year as older broadcasts travel outward.
- ID
- Earth radio bubble
- Radius
- 100 ly · 30.7 pc
- Center
- Sun (Earth at this scale)
- Growth
- ~1 ly per year
- Epoch
- mid-2020s estimate