| The terrestrial planets in our solar system all have very specific spectroscopic fingerprints that tell us quite a bit about their atmospheres. |
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| From the evidence found on the Moon, geophysicists can extrapolate a picture of the early history of the four terrestrial planets. |
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| Moving beyond the Earth to the other terrestrial planets, we find that the rocks there are also dominantly silicates. |
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| A key issue in astrobiology is to understand the processes responsible for the geological and geophysical evolution of terrestrial planets. |
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| Startlingly, of the four terrestrial planets, only Earth shows evidence of long-term, pervasive plate tectonics. |
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| So we have the terrestrial planets, and any time we talk about Mercury, Venus, Earth, Mars, we mention the grouping. |
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| Volcanic activity has been an important force in the shaping of the surfaces of the Moon and the terrestrial planets. |
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| A French-American team examined the issue of proximity between NEOs and the terrestrial planets. |
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| They are called the terrestrial planets because they have solid rocky surfaces, and are somewhat similar in size and composition to the Earth. |
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| The furthest and smallest once considered planet Pluto is solid as ice when compared to the terrestrial planets. |
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| Scientists believe that comets may have contributed greatly to water on the Earth and other terrestrial planets. |
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| One feature that Mercury and Earth, alone among the terrestrial planets, have in common is a magnetic field and a resulting magnetosphere. |
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| In our solar system, the four inner solid planets are known as terrestrial planets because of their resemblance to the Earth. |
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| The terrestrial planets are small, dense, rocky worlds, located in the inner part of our solar system. |
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| Understanding Mercury and the forces that shaped the planet is fundamental to understanding the terrestrial planets and their evolution. |
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| The first zone contains the rocky, terrestrial planets of Mercury, Venus, Earth and Mars. |
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| Plains relatively flat or smoothly undulating surfaces are ubiquitous on Mercury and the other terrestrial planets. |
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| Extraterrestrial rift valleys are also known to occur on other terrestrial planets and natural satellites. |
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| Asteroids are rocky objects composed of material similar to the crusts of the terrestrial planets, and are thought to be remnants from the formation of the solar system that did not condense into a planet. |
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| Ultimately, as the search for terrestrial planets becomes feasible, it may become possible to search for traces of carbon dioxide, water, and oxygen in their atmospheres, as signatures of biological activity. |
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| These observations allow for the first time to study the characteristics of the dust from protoplanetary discs at distances where terrestrial planets form. |
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| Are there many rocky terrestrial planets like Earth? |
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| It is also possible that terrestrial planets had magma oceans at some point during their formation as a result of giant impacts. |
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| Earth is the densest planet in the Solar System and the largest of the four terrestrial planets. |
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| Extrasolar terrestrial planets that are extremely close to their parent star will be tidally locked and so one half of the planet will be a magma ocean. |
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| The inner terrestrial planets consist of Mercury, Venus, Earth, and Mars. |
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| The appearance of plate tectonics on terrestrial planets is related to planetary mass, with more massive planets than Earth expected to exhibit plate tectonics. |
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| In geology, bedrock is the lithified rock that lies under a loose softer material called regolith at the surface of the Earth or other terrestrial planets. |
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