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Official site of the design, build, test and launch of JWST.


Many organizations play a role in the JWST design, construction and in the future collection and distribution of JWST science data.

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WEBB CAM : Watch us build the Webb Telescope at NASA Goddard Space Flight Center!

*NOTE: There may be sporadic outages of the webcams during the next week or so. (5/19/17)

On this page:

Cam 1 | Cam 2 | Cam Info

Images are captured 1/min and automatically refresh on screen at the same rate.
NOTE: Users on mobile/slower connections may wish to chose smaller sizes to minimize bandwidth and load times. Max sized images are ~300KB each.

Cam 1 :

Small | Medium | Max (Fit Screen) | Max (1920px)

Cam 2 :

Small | Medium | Max (Fit Screen) | Max (1920px)

On the WebbCams Today

On our Webbcams are views of "Chamber A" at NASA's Johnson Space Center. Chamber A is a massive thermal-vacuum chamber. This means that it can mimic the vacuum of space, and can also be cooled to extremely low temperatures, like the ones at which the James Webb Space Telescope will be operating. Webb is currently at NASA Johnson for an end-to-end test of the telescope at cryogenic temperatures in Chamber A.

In more technical terms, the end-to-end test on Webb's telescope involves passing light through the entire assembled telescope using test point sources of light from precision-placed fiber optics and using reflecting mirrors (three auto-collimating flat test mirrors). This will re-check alignment of all the telescope optics assembled together and demonstrate that the individual primary mirror segments can be aligned to each other, and it will re-check the figures of the mirrors.

Although there is no view of Webb once it is inside the chamber during the actual cryo-optical testing, there will be much activity on Webb in the cleanroom itself for several weeks before and after.

The image is updated once per minute. The webcam pages and widgets update at the same rate to keep the latest image on screen. You can view the webcam on our Home page or on our webcam page at various sizes up to 1920px wide.

Those who work in cleanrooms (like the one in front of Chamber A) must dress in the outfits you see them in on the webcam (known unofficially as "bunny suits"). This is to ensure that any particles or contaminants on their persons are contained, in order to keep the room as clean as possible. The process of getting suited up is not trivial and the cleanroom workers often spend very long hours in the cleanroom without an easy way to leave for breaks. We on the project are very appreciative of the hard work they put into building and testing the hardware in such a challenging work environment.

You can read more about how the testing is different for Webb and Hubble's mirrors, and what Hubble taught us on our FAQ.

You can read about upcoming milestones on our "What's Next" page.

Webb-cam Time-Lapse Movies

Note that our webcam was at NASA Goddard for many years. Be sure to check out our playlist of Webb-cam time-lapse movies that compress hours and even days of Goddard Webb-cam footage into a few minutes. Many of the recent significant events are captured in time-lapse.

Related Images

About the Spacecraft Components

To learn more about the various components of the Webb Telescope, see the Observatory page as well as our interactive 3d spacecraft model (new window) (requires flash).


(There is always the possibility that the webcam may not function properly. Please bear with us if that is the case.)