Alignment of segments in Webb’s primary mirror completed
Click for full image.
Astronomers and engineers have now successfully completed the alignment of the eighteen segments in the primary mirror of the James Webb Space Telescope.
On March 11, the Webb team completed the stage of alignment known as “fine phasing.” At this key stage in the commissioning of Webb’s Optical Telescope Element, every optical parameter that has been checked and tested is performing at, or above, expectations. The team also found no critical issues and no measurable contamination or blockages to Webb’s optical path. The observatory is able to successfully gather light from distant objects and deliver it to its instruments without issue.
The picture to the right shows that alignment, focused on a single star. As noted in the caption:
While the purpose of this image was to focus on the bright star at the center for alignment evaluation, Webb’s optics and NIRCam are so sensitive that the galaxies and stars seen in the background show up.
After many years delay and an ungodly budget overrun, thank goodness Webb appears to be working better than expected.
It will still be several months before actual science observations begin. Further more precise alignment adjustments need to be done for all its instruments and mirrors.
Click for full image.
Astronomers and engineers have now successfully completed the alignment of the eighteen segments in the primary mirror of the James Webb Space Telescope.
On March 11, the Webb team completed the stage of alignment known as “fine phasing.” At this key stage in the commissioning of Webb’s Optical Telescope Element, every optical parameter that has been checked and tested is performing at, or above, expectations. The team also found no critical issues and no measurable contamination or blockages to Webb’s optical path. The observatory is able to successfully gather light from distant objects and deliver it to its instruments without issue.
The picture to the right shows that alignment, focused on a single star. As noted in the caption:
While the purpose of this image was to focus on the bright star at the center for alignment evaluation, Webb’s optics and NIRCam are so sensitive that the galaxies and stars seen in the background show up.
After many years delay and an ungodly budget overrun, thank goodness Webb appears to be working better than expected.
It will still be several months before actual science observations begin. Further more precise alignment adjustments need to be done for all its instruments and mirrors.
