inner planet

noun

: any of the planets Mercury, Venus, Earth, and Mars whose orbits are within the asteroid belt

Examples of inner planet in a Sentence

Recent Examples on the Web As a red giant, the sun will likely evaporate the solar system’s inner planets such as Mercury and Venus, although Earth’s fate remains unclear, according to NASA. Ashley Strickland, CNN, 26 Feb. 2024 Kane’s analysis, published last month, shows that the growing star will engulf the three inner planets. Quanta Magazine, 20 Dec. 2023 And the question is: How, among these inner planets, was Earth the only one who could begin life and sustain life? Chris Klimek, Smithsonian Magazine, 16 Nov. 2023 All of the planets are larger than Earth, with the two inner planets just slightly larger and the other five planets even bigger, about twice the size of Earth. Kerry Breen, CBS News, 3 Nov. 2023 The comet takes 133 years to make one complete passage from deep space, toward the inner planets, around the sun, and out and back again. Jeffrey Kluger, Time, 11 Aug. 2023 In the Distant Future One day, billions of years from now, earth will fall into the sun, along with inner planets Mercury, Venus and Mars, possibly causing the star to swell further. Matt Hrodey, Discover Magazine, 11 May 2023 Although past observations have confirmed the result of planetary engulfment when sun-like stars expand – up to 1,000 times the original size – and engulf the system's inner planets, astronomers had not seen it until now. Julia Musto, Fox News, 4 May 2023 But our inner planets seem to have formed with little of the element or lost it early in their history. John Timmer, Ars Technica, 12 Apr. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'inner planet.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1951, in the meaning defined above

Time Traveler
The first known use of inner planet was in 1951

Dictionary Entries Near inner planet

Cite this Entry

“Inner planet.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/inner%20planet. Accessed 19 Apr. 2024.

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