CAPE CANAVERAL, Fla. (AP/CLARKSVILLENOW) — The U.S. Postal Service is going all out for this summer’s total solar eclipse, with a first-of-its kind stamp.

Just touch the stamp with your finger, and the heat transforms the image of the blacked-out sun into the moon. Remove your finger, and the eclipse reappears. The trick is using temperature-sensitive ink.

There’s a map on the back of the stamp sheet showing the eclipse’s diagonal path across the U.S. on Aug. 21, as the moon covers the sun in the sky.

It will be the first total solar eclipse visible in the contiguous United States since 1979 and the first one coast to coast since 1918.

The Forever 49 cent stamp comes out on June 21 — the summer solstice.

The Dawson Springs Post Office in Dawson Springs, Ky. will host an event on Wednesday, June 21, at 9:00 a.m. to commemorate the release of the first-of-its-kind stamp. The Total Eclipse of the Sun Forever stamps will be revealed during a special ceremony at the 101 West Ramsey Street location.

The event is free and open to the public. Attendees can purchase the stamps and obtain a special cancellation after the ceremony.

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