Related terms:
solar minimum
solar cycle
solar surface
active regions
solar activity
space weather
euv
moon bounce
solar radio
amateur radio bands
activity cycle
invisible landscape
solar magnetic
van stone
space radiation
secondary radiation
amateur satellite
amateur radio service
radio bands
interplanetary space
galactic cosmic rays
Wikipedia sources:
Solar maximum
Solar cycle
Solar minimum
2012 phenomenon
Amateur radio frequency allocations
Coronal loop
Health threat from cosmic rays
Coronal mass ejection
2012
Context for words:
solar
maximum
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