10 facts about planets
1. A planet is a space body that orbits a star or stellar remnant and has its own gravity.
2. Planet is an ancient term and is tightly related to history, science, myth and also religion.
3. In ancient cultures the planets were considered as divine.
4. So far, scientists did not figure out an uncontested definition of a planet.
5. Ptolemy thought the planets were orbiting the Earth.
6. Planets are classified into two types: low-density gas giants, and small rocky terrestrials. Mercury, Venus, Earth, and Mars are terrestrial planets.
7. Mercury and Venus don’t have natural satellites.
8. 344 extrasolar planets were discovered so far by our scientists.
9. Jupiter is the largest planet in Our Solar System.
10. Pluto is no longer defined as the planet; recently it was reclassified as the dwarf planet.
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