Launched on 25 December 2021, the James Webb Space Telescope obits the Sun approximately 1.5 million kms from the Earth. It uses it's large mirror array to capture visible to infra-red light allowing it to see further into space than any telescope before it.
These are some of the better applications of FD postmarks I've received from the USPS. FD postmarks from the States can be quite large so I also try to keep that in mind when placing graphics on the envelopes. I always try to keep it simple.
On the envelope above I used a NASA image of the assembled system at Northrop Grumman's facilities in Redondo Beach, California. And on the larger envelope below I added the official mission logo.
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