Check out @NASAWebb's mirrors compared to Hubble. Cannot wait to learn the secrets it unlocks after 2018 launch! http://www.huffingtonpost.com/entry/nasa-james-webb-telescope_us_583dedcae4b04fcaa4d556e5 …pic.twitter.com/7mUlU7Wrb4
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It will not be, but remember Hubble is very much the exception, not the rule. http://jwst.nasa.gov/faq.html#serviceable …