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

Album created by album from Marginal Hacks by David Ljung Tue Oct 13 19:59:30 2026