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The planet’s large size – with a radius 2.6 times that of Earth – means that the planet’s interior likely contains a large mantle of high-pressure ice, like Neptune, according to astronomers.—Eric Lagatta, USA Today, 19 Apr. 2025 The love planet will also conjunct Neptune on May 2, adding a magical, almost surreal quality to these connections.—Valerie Mesa, People.com, 19 Apr. 2025 Astronomers think that this world could either be a smaller version of our solar system’s ice giant Neptune, called a mini-Neptune, or perhaps a rocky planet with no water but a massive hydrogen atmosphere, called a gas dwarf.—Daniel Apai, The Conversation, 18 Apr. 2025 The exoplanet’s size appears to be between that of Earth and Neptune and belongs to a range that scientists have never seen up close.—Meghan Bartels, Scientific American, 17 Apr. 2025 See All Example Sentences for Neptune
Word History
Etymology
Latin Neptunus
First Known Use
before the 12th century, in the meaning defined at sense 1a
Time Traveler
The first known use of Neptune was
before the 12th century
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