Pluto and Its Moon Charon

Postcard DE-4851768 from Germany shows Pluto and its moon Charon.

USPS announces that it will issue the Pluto – Explored! Forever stamps at the Jacob Javits Center in New York City, New York on May 31, 2016 during the World Stamp Show – NY 2016, in order to recognize the NASA's history-making first reconnaissance of Pluto: New Horizons mission in 2015.

The souvenir sheet contains four stamps in two designs. The first design shows an illustration of the New Horizons spacecraft, while the second design shows a striking image of Pluto taken by the spacecraft near its closest approach. The image is a composite of four photos from the Long Range Reconnaissance Imager, combined with data from the sensor Ralph.

Personal Environment Monitor by Lapka

Postcard US-2692591 to Ukraine shows a sensor for the Personal Environment Monitor (PEM) by Lapka™, which can be connected to a smart phone connect through the device's headphone jack. PEM works with your smart phone to measure and monitor humidity, electromagnetic fields, and radiation in your personal environment space at work and at home. One of the sensors in a form of a stainless steel probe can even help you verify whether those "organic" vegetables and fruits you bought at the store are really organic by measuring the quantities of nitrates in those organic matters. The postcard was obtained at Lapka's booth at the 2013 CES.