terrestrial planets


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terrestrial planets

The planets Mercury, Venus, Earth, and Mars. They are small rocky worlds with shallow atmospheres in comparison with the mainly gaseous giant planets.
References in periodicals archive ?
The space agency believes this will provide an idea of how terrestrial planets are created.
In other words, Vesta may be the preserved remnant of a transitional class of planetary objects--it's no longer a primitive asteroid but it's not quite a classical terrestrial planet either.
Jovian planets rotate faster than terrestrial planets.
At more than three times the radii of the Earth, these gaseous planets are less common than terrestrial planets, but each is expected to host several large moons.
They describe the discovery of the solar system, theories of its origin, how scientists constructed a timeline of the solar system and its major events, the role of meteorites, the chemical elements that make up the solar system, the birth of the Sun and the planets, how protoplanets became the terrestrial planets, the formation of the Moon, the development of life on Earth, the formation of giant planets, the asteroid belt between Mars and Jupiter, and objects in the outermost solar system.
25 ( ANI ): Researchers have discovered that interplanetary dust particles (IDPs) can deliver water and organics to the Earth and other terrestrial planets.
He added: "These water-rich building blocks, and the terrestrial planets they build, may in fact be common - a system cannot create things as big as asteroids and avoid building planets, and GD 61 had the ingredients to deliver lots of water to their surfaces.
The topics include the Sun and other stars, the terrestrial planets, the Moon, asteroids, comets and the Kuiper Belt, and theories of the origin and evolution of the Solar System.
"Our understanding is that this kind of meteorite is the starting composition of the terrestrial planets, from Mercury to the Earth."
From telescopic studies, we knew this Arizona-sized world had an interesting shape and composition, and that it's a possible example of the building blocks from which all the terrestrial planets formed 4.6 billion years ago.
They also show how this theory can be applied to analyzing the super-rotation of slowly rotating terrestrial planets and major moons, and the key large-scale features of the gas giants in the solar system.
Team member Dr Paul Butler, from the Carnegie Institution of Washington, said: "This is the smallest extrasolar planet yet detected and the first of a new class of rocky terrestrial planets. It's like Earth's bigger cousin."

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