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I am disappointed to have to raise my  TRACKED INTERNATIONAL shippings rates from $14 to $20. This also means a change from USPS to UPS (United Parcel Service) for this service. If I stayed with USPS it would increase to $25. Unforetunately, these rate incrases are out of my control. The most affordable rate is to use untracked postage, which remains $4. Please see my FAQ page. 

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NASA SOFIA End of Service Commemorative Patch

NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA)  airborne observatory concludes 12 years of dedicated service in October 2022. This specially-modified Boeing 747SP flies above most of the Earth's water vapor to enable infrared telescope observatons. It has provided a platform for hundreds of observation experiments as well as a tool for STEM outreach to educators. Unlike ground-based observatories, SOFIA has the ability to fly between the north and south hemispheres to maximize night-time observation times during their respective winters. 

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