20 July (Mali ) within release Space Explorations 1999 goes into circulation Mini Sheet Space Events face value 4*900 West African CFA franc
Mini Sheet Space Events in catalogues | |
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Michel: | Mi: ML 2275-2279KB |
Mini Sheet is square format.
Also in the issue Space Explorations 1999:
Mini Sheet Space Events it reflects the thematic directions:
Outer space (or simply space) is the expanse that exists beyond Earth's atmosphere and between celestial bodies. It contains ultra-low levels of particle densities, constituting a near-perfect vacuum of predominantly hydrogen and helium plasma, permeated by electromagnetic radiation, cosmic rays, neutrinos, magnetic fields and dust. The baseline temperature of outer space, as set by the background radiation from the Big Bang, is 2.7 kelvins (−270 °C; −455 °F)
A scientist is a person who researches to advance knowledge in an area of the natural sciences
A spacecraft is a vehicle that is designed to fly and operate in outer space. Spacecraft are used for a variety of purposes, including communications, Earth observation, meteorology, navigation, space colonization, planetary exploration, and transportation of humans and cargo. All spacecraft except single-stage-to-orbit vehicles cannot get into space on their own, and require a launch vehicle (carrier rocket).