eldavojohn writes: The Hubble Telescope's successor reached a milestone today as it passed all critical tests. The James Webb Space Telescope (JWST) was orginialy set to launch in 2013 but has run about a billion over budget and been pushed back to a 2014 launch. This good news means that hopefully there won't be further delays as the JWST has accomplished all science and engineering requirements for all mission critical design functionalities. Scientists, of course, find these delays and costs meaningless compared to the JWST's Promethean goals and observations. Despite it being the loyal Hubble's twilight hours, these are exciting times for many realms of science.