On 03/02/2022 03:41, MitchAlsup wrote:
There is a tank of 'some kind of gas' that can blow off the dust that will collect on the mirrors.
SOHO has been working for over 25 years and no one goes out there to
polish the glass, unlike the James Webb it points towards the solar
wind. Although various corrective optics were added to the Hubble to
fixed the flaw they didn't wipe the mirror while there either, it's
still limping along after 30 years.
They all work in a hard vacuum.
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