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
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Venus, like Mercury, is an inner planet to Earth, so it is often lost in the sun’s glare and can thus only ever be seen just before sunrise or after sunset.
—
Jamie Carter,
Forbes.com,
16 Mar. 2026
Saturn Slightly higher than both inner planets will be Saturn, which at magnitude 1 may require careful scanning in the bright twilight with a pair of binoculars.
—
Jamie Carter,
Space.com,
26 Feb. 2026
The young, cool star is orbited by four inner planets, one of which has just formed a large moon in the aftermath of a giant impact, followed by an asteroid belt, four gas giants, a Kuiper belt, and an Oort cloud.
—
Ethan Siegel,
Big Think,
2 Oct. 2025
If our sun were replaced with Betelgeuse, the star would not only engulf Earth and all the inner planets but reach past the orbit of Jupiter, according to NASA.
—
Ashley Strickland,
CNN Money,
26 July 2025
See All Example Sentences for inner planet
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Jamie Carter,
Forbes.com,
16 Mar. 2026
Saturn Slightly higher than both inner planets will be Saturn, which at magnitude 1 may require careful scanning in the bright twilight with a pair of binoculars.
—
Jamie Carter,
Space.com,
26 Feb. 2026
The young, cool star is orbited by four inner planets, one of which has just formed a large moon in the aftermath of a giant impact, followed by an asteroid belt, four gas giants, a Kuiper belt, and an Oort cloud.
—
Ethan Siegel,
Big Think,
2 Oct. 2025
If our sun were replaced with Betelgeuse, the star would not only engulf Earth and all the inner planets but reach past the orbit of Jupiter, according to NASA.
—
Ashley Strickland,
CNN Money,
26 July 2025
See All Example Sentences for inner planet
Cite this Entry
“Inner planet.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/inner%20planet. Accessed 6 Jul. 2026.
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