Re: Hubble COSTAR removal

On May 15, 12:40 am, Golden California Girls <gldncag...@xxxxxxxxxxx>
wrote:
GSWeb8 wrote:

Part of this mission calls for removing the instrument that corrected
Hubbel's optical problem. How will the new (and/or upgraded)
instruments work once the COSTAR is removed? Are these new instruments
not going to use the designed and corrected optical path?

"Since the first servicing mission, all of Hubble's replacement instruments have
had technology built in to them to correct Hubble's marred vision, making COSTAR
no longer necessary.

I thought the correcting device with tiny mirrors had been a temporary
fix, and later they replaced the Hubble secondary instead, which
corrected the spherical aberration more simply. (Since the result is
still not a Ritchey-Chretien, though, one either lives with the
resulting coma, or puts additional stuff in the instruments to correct
*that* aberration.)

John Savard
.

Relevant Pages

  • Re: Hubble COSTAR removal
    ... corrected Hubbel's optical problem. ... upgraded) instruments work once the COSTAR is removed? ... making COSTAR no longer necessary. ...
    (sci.astro.amateur)
  • Re: Hubble COSTAR removal
    ... Hubbel's optical problem. ... instruments work once the COSTAR is removed? ... not going to use the designed and corrected optical path? ... had technology built in to them to correct Hubble's marred vision, making COSTAR ...
    (sci.astro.amateur)
  • Hubble COSTAR removal
    ... Hubbel's optical problem. ... instruments work once the COSTAR is removed? ...
    (sci.astro.amateur)
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