How did Neptune get its name?

The Romans named the five planets closest to the Sun after their most important gods. These were the only planets that were bright enough for them to see. Later, when telescopes were used, other planets were discovered. Astronomers decided to continue naming the planets after Roman Gods. Neptune, a blueish planet, was named after the Roman god of the sea.


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Learn about IRAS, the first infrared telescope launched into Earth's orbit!