- pronunciation:
- plae
niht
- features:
- Word Combinations (noun), Word History, Word Explorer
| part of speech: |
noun |
| definition: |
a large object in outer space that moves around the sun or another star.
There are eight planets in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
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| related words: |
globe |
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The word
planet entered English eight hundred years ago, during the Middle Ages. "Planet" comes from the ancient Greek term
asteres planetai or "wandering stars." In 1640, astronomers began using the word "planet" in its modern sense of a body that circles a star (the sun).