Here’s a couple of fun facts about this often-overlooked planet
- It is the smallest planet
- It is the closest planet to the sun
- It cannot be seen when the sky is fully dark. Mercury can only be observed at dusk and at dawn when there is some light from the sun
- Though it is the most difficult of the visible planets to see, Mercury’s existence has been known since ancient Sumerian times, roughly 5,000 years ago
- Early ancient peoples believed that Mercury was two distinct stars, one appearing in the east at dawn and the other in the west in the evening. By the time of Plato, however, around 350 BCE, Greek astronomers realized it was a single planet
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