Stargazing The terrible distortions of the Hubble Telescope

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The discussion centers on the Hubble Telescope's image distortions, particularly the four streaks of light caused by the struts holding the secondary mirror. Participants debate potential alternative designs that could minimize these artifacts, such as magnetic suspension or using a transparent sheet for support. Some argue that the diffraction spikes have minimal impact on scientific data quality and can be digitally corrected, while others criticize the design choices as incompetence. The conversation also touches on the historical context of the Hubble's mirror fabrication errors, emphasizing that the primary mirror was ground correctly, but issues arose from the null corrector's misalignment. Ultimately, the design decisions reflect a balance between structural stability and scientific objectives.
  • #51
What I find that's miraculous, was the another group of fallible humans were able to come up with an optical solution that created some of the most dramatic and amazing space images mankind has ever seen (until the James Webb, I think). Hubble has done for cosmology what Galileo did for basic astronomy. Just those deep field images were awe inspiring in the literal sense of the word. The thought that in every tiny area of the sky you look at is teeming with galaxies that go on and on, simply puts the definition of the universe in a completely new context for layman like myself. That being said, I hope that they get the James Webb right the first time, since it's distance from Earth precludes a space walk to fix it.
 
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  • #52
trainman2001 said:
since it's distance from Earth precludes a space walk to fix it.
The SLS could target the JWST at some point, and I'm sure Elon Musk would be interested in selling a Falcon Heavy / Dragon 2 mission to NASA. Both options would need a long time and a lot of money, however.
 

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