terrestrial planet

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terrestrial planet

Any of the four planets, Mercury, Venus, Earth, and Mars, whose orbits are closest to the sun. Also called inner 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.

in′ner plan′et

any of the four planets closest to the sun: Mercury, Venus, Earth, or Mars.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.terrestrial planet - a planet having a compact rocky surface like the Earth's; the four innermost planets in the solar system
major planet, planet - (astronomy) any of the nine large celestial bodies in the solar system that revolve around the sun and shine by reflected light; Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto in order of their proximity to the sun; viewed from the constellation Hercules, all the planets rotate around the sun in a counterclockwise direction
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
"Once you have the rocky planet and the ingredients for life," says Lisa Kaltenegger, a Cornell astronomer, "then you could have life." While the known planets around Kepler 444 are inhospitable, planets with temperate climates may have been forming around other stars at the same time.
"We are watching rocky planet formation happen right in front of us," said George Rieke, a University of Arizona co-author of the new study.
Given the larger data set, researchers estimate that one in five Sun-like stars hosts at least one rocky planet orbiting in its habitable zone.
The rocky planet Mercury would be a molten droplet of lava at this temperature.
The Holy Grail of exoplanet searches is finding an Earth-size planet in a star's habitable zone, but that's more easily defined in words--"the region around a star where a rocky planet with an atmosphere could host liquid water on its surface"--than in practice.
In January 2011, the Kepler team reported the discovery of the first unequivocally rocky planet around another star, Kepler-10b.
It's a rocky planet in that cozy habitable zone that gets about the same amount of energy from its relatively small and cool star as we do from the Sun.
There are more than 1,000 confirmed exoplanets and more than 3,000 exoplanet "candidates." "An important question is whether or not our Earth is a typical rocky planet," said Fischer.
Ironically, it's the gas giant, not the super-Earth, that lies in the stars' "habitable zone," the region where a rocky planet with a thick atmosphere could have liquid water on its surface.
A team of researchers from NASA's Kepler Mission has discovered what could be a large, rocky planet with a surface temperature of about 72 degrees Fahrenheit, comparable to a comfortable spring day on Earth.
Astronomers have discovered a frozen, rocky planet orbiting one of a pair of faint red stars.
The amount of lithium and the engulfed rocky planet material in the atmosphere of HIP68468 adds up to the equivalent of the mass of six Earths.

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