Heat-sensitive eclipse postage stamp will change when touched

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To celebrate the upcoming total solar eclipse, the U.S. Postal Service is releasing its first thermochromic stamp.

The most recent total eclipse over the continental US occurred in 1979; the next one will occur in 2024.

The Total Eclipse of the Sun Forever stamp which commemorates the August 21, 2017, eclipse will be available June 20, 2017, for purchase.

The back of the stamp pane shows a map tracking the coming eclipse's path.

The Total Eclipse of the Sun Forever stamp, designed by Antonio Alcalá, uses a photograph of a total solar eclipse captured in Jalu, Libya, on March 29, 2006, by Fred Espenak, a retired NASA astrophysicist at Goddard Space Flight Center and an eclipse expert. Then, after touching the circle, the body heat will produce a reaction which changes the circle to a moon image.

The panelists will provide important safety and travel information about the eclipse, as well as discuss scientific studies that will take place during the rare celestial event.

The stamp can be purchased at the post office or online. The next time a total solar eclipse will be visible from the USA, according to Espanak's website, is April 8, 2024.

The next total solar eclipse over KC won't happen until 2205. A partial eclipse will be visible throughout the rest of the country. NASA TV and NASA.gov will broadcast a live panel discussion and news conference starting at 1 p.m. ET Wed.

On the day of the eclipse, take a photo of the map on the back of the stamp pane with either your finger pointed to your location, or write in the name of your location and draw an arrow to it. Try to include a recognizable landmark in the photo's background.

The stamps go on sale Tuesday, and they say keep these stamps out of sunlight as much as possible to preserve this special effect.

Ordering First-Day-of-Issue Postmarks Customers have 60 days to obtain the first-day-of-issue postmark by mail.

The Postal Service is issuing a one-of-a-kind stamp Tuesday that transforms from a solar eclipse into the moon with the touch of a finger.

475329, Protective Sleeve, 25-cents.



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