Stamp: Casandra X-ray Observatory (Tonga 2021)
Casandra X-ray Observatory (Tonga 2021)
01 January (Tonga ) within release The Best of the Smithsonian (2021) goes into circulation Stamp Casandra X-ray Observatory face value 40 Tongan seniti
| Stamp Casandra X-ray Observatory in catalogues | |
|---|---|
| Yvert et Tellier: | Yt: TO 1665 |
Stamp is square format.
Also in the issue The Best of the Smithsonian (2021):
- Mini Sheet - The Best of the Smithsonian face value 6*40;
- Mini Sheet - The Best of the Smithsonian face value 6*50;
- Stamp - America on the Move face value 50;
- Stamp - At the Controls face value 50;
- Stamp - Butterfly Pavilion face value 40;
- Stamp - Casandra X-ray Observatory face value 40;
- Stamp - Conservation Biology Institute face value 40;
- Stamp - Division of Cultural and Community Life face value 50;
- Stamp - Division of Work and Industry face value 50;
- Stamp - Mineral Sciences face value 40;
- Stamp - National Fish Collection face value 40;
- Stamp - National Quilt Collection face value 50;
- Stamp - Smithsonian Gardens face value 40;
- Stamp - Smithsonian Librairies and Archives face value 50;
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Data entry completed
50%
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| Stamp Casandra X-ray Observatory in digits | |
| Country: | Tonga |
| Date: | 2021-01-01 |
| Print: | Offset lithography |
| Emission: | Commemorative |
| Format: | Stamp |
| Face Value: | 40 Tongan seniti |
Stamp Casandra X-ray Observatory 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. .
