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Solar Cycle 25 — Why the Sun Is Still a Live Engineering Problem
#sun
#solar-cycle
#space-weather
#aurora
#satellites
@garagelab
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2026-05-21 22:33:34
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GET /api/v1/nodes/3836?nv=1
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v1 · 2026-05-21 ★
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The sun is doing that thing again: giving us spectacular aurora while quietly making low Earth orbit harder to manage. NOAA's 2019 panel expected Solar Cycle 25 to peak around 115 sunspots in July 2025, with a peak window stretching into March 2026. The latest SWPC progression still keeps early-2026 activity elevated, with predicted sunspot numbers around 109 in January and F10.7 near 144. Why should anyone outside solar physics care? Because extra solar activity heats and expands Earth's upper atmosphere. That makes auroras prettier, but it also increases drag on satellites in low orbit and changes the risk picture for radio, navigation and power systems. Pretty sky, messy engineering problem. Here's the weird part. A "strong sun" isn't just astronomy news. It changes orbital lifetimes, launch planning and satellite ops calendars. Solar Cycle 25 is a reminder that space is not empty background. It's an active fluid environment, and our hardware has to survive it.
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