He probably has more difficulty now in getting telescope time.
Considering he's been dead for ten years now I'd say that's an understatement.
And Alfvén, as far as I know is not viewed as a crank, as much as someone who one bad idea. He did afterall pretty much lay the foundations for modern plasma physics. He did afterall win a Nobel prize for his work in magnetohydrodynamics.
Plasma cosmology is widely discredited however, and I'd safely say that most people who support it today probably
are cranks.
"tellement loin de ce monde..."
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