Tonight my wife and I were observing from the Rio Hurtado valley in Chile using my 20” dob. We both saw the Horsehead Nebula with a Lumicon UHC filter. We also saw it with a Lumicon H-Beta filter and...
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Tonight my wife and I were observing from the Rio Hurtado valley in Chile using my 20” dob. We both saw the Horsehead Nebula with a Lumicon UHC filter. We also saw it with a Lumicon H-Beta filter and...