inner planet

See terrestrial planet.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

inner planet

(Celestial Objects) any of the planets Mercury, Venus, earth, and Mars, whose orbits lie inside the asteroid belt

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

in′ner plan′et

any of the four planets closest to the sun: Mercury, Venus, Earth, or Mars.

[1950–55]

Mentioned in

References in classic literature

As these catastrophes occur, the sun will blaze with renewed energy; and it may be that some inner planet had suffered this fate.

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"The two planets resemble the inner planets of our solar system," comments lead author Mathias Zechmeister of the Institute for Astrophysics at the University of Gottingen.

Two Earth-like planets found near dwarf star

"The two planets resemble the inner planets of our solar system," explains lead author Mathias Zechmeister of the Institute for Astrophysics at the University of GE[micro]ttingen.

Two Earth-Like Planets Near Teegarden's Star

Studying it is expected to provide additional knowledge on the origin and evolution of the inner planets and, in particular, the origin of water and organic compounds on Earth, which are all relevant to the origin of life on Earth.

Asteroid landing: Japan's Hayabusa-2 spacecraft TOUCHES DOWN on speeding Ryugu; The spacecraft was programmed to extend a tube to touch the surface, shoot a bullet into the asteroid and collect the bits of rock and dust thrown up by the impact

Asteroids (minor planets in the inner solar system) are the bits and pieces left over after the formation of the inner planets, including the Earth.

Asteroids

Caption: Bob made a sphere-cutting tool for his lathe so he could make the inner planets himself.

A Scale Model Solar System: This project is literally far out

The astronomers studied levels of UV radiation emitted by Trappist-1 which suggest its inner planets could have lost 20 times more water in the last eight billion years than all the Earth's oceans combined.

Discovery of three Earth-sized planets 'likely to have water'

On the two inner planets, a year lasts just a couple of days.

Exoplanet trio could harbor life: worlds orbiting cool star are good place to look for aliens

In our solar system there are many comets that spend a lot of their time among the inner planets, Venus, Earth and Mars.

Wark Hexham skywatcher on how the Orionid meteor shower could be the lightshow of the year; Dark Sky Observatory astronomer Roy Alexander on why we should be looking to the skies on Wednesday and Thursday night

Expanding outwards into the solar system, it will consume most of the inner planets (including the Earth).

Red dwarf stars are coolest - at 3000C