public : ham : Radio astronomy : H1 lines |
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![]() 3C144 1420MHz |
![]() Cassiopeia 1420MHz |
![]() Deneb 1420MHz |
![]() M1 1420MHz |
![]() M42 1420MHz |
![]() M76 1420MHz |
![]() M81 1420MHz |
![]() M97 1420MHz |
meas info |
![]() Milkyway hydrogen line spectrum |
![]() W3 1420MHz |