27 November (Slovenia ) within release Space goes into circulation First Day Cover Centenary of the birth of Herman Potočnik face value 46 Slovenian tolar
First Day Cover Centenary of the birth of Herman Potočnik in catalogues | |
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Michel: | Mi:SI FDC34 |
First Day Cover is horizontal format.
Also in the issue Space:
First Day Cover Centenary of the birth of Herman Potočnik it reflects the thematic directions:
Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, meteoroids, asteroids, and comets. Relevant phenomena include supernova explosions, gamma ray bursts, quasars, blazars, pulsars, and cosmic microwave background radiation. More generally, astronomy studies everything that originates beyond Earth's atmosphere. Cosmology is a branch of astronomy that studies the universe as a whole. .