why is venus hotter than mercury?
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The carbon dioxide traps most of the heat from the Sun. The cloud layers also act as a blanket. The result is a “runaway greenhouse effect” that has caused the planet's temperature to soar to 465°C, hot enough to melt lead. This means that Venus is even hotter than Mercury.
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At about three thousand miles in diameter, Mercury is the smallest planet in the solar system. But its core is massive — it accounts for more than three-quarters of the little planet's diameter, and more than half its mass. ... So even though Mars is bigger than Mercury, it's less dense — a rocky planet with a difference.
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Volcanoes are present throughout the terrestrial planets. Venus, Earth, and Mars have active ones, while Mercury's volcanoes are no longer active. ... The inner planets have volcanoes because they contain hot magma. (The outer planets are cold, so they erupt frozen gases instead of molten rock.)
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Generally, planets closer to the sun are rocky (Mercy, Venus, Earth, Mars), whereas planets further away are made of gasses (Juptier, Venus, Uranus, Neptune) because as the planets formed, the planets closer to the sun had their gasses were stripped away due to the heat of the sun, whereas planets slightly further away ...
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['Mercury - 800°F (430°C) during the day, -290°F (-180°C) at night.', 'Venus - 880°F (471°C)', 'Earth - 61°F (16°C)', 'Mars - minus 20°F (-28°C)', 'Jupiter - minus 162°F (-108°C)', 'Saturn - minus 218°F (-138°C)', 'Uranus - minus 320°F (-195°C)', 'Neptune - minus 331°F (-201°C)']
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The similarity in size and density between Venus and Earth suggests that they also share a similar internal structure: a core, mantle and crust. The Venusian core is also partially liquid like Earth because the two planets have been cooling at about the same rate.
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A higher temperature tries to dissipate an atmosphere while higher gravity tries to retain an atmosphere. ... The terrestrial planets are small in mass and warm, so they have thin atmospheres made of heavier molecules like carbon dioxide or nitrogen.
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The greenhouse effect determines the flow of energy arriving at and leaving from Earth. ... Venus is similar to Earth in terms of size and mass, but its surface temperature is about 460 degrees Celsius. This is hot enough to melt lead! The Venusian atmosphere is mainly made up of carbon dioxide, a greenhouse gas.
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Venus Inside and On Top The planet is a little smaller than Earth, and is similar to Earth inside. We can't see the surface of Venus from Earth, because it is covered with thick clouds. However, space missions to Venus have shown us that its surface is covered with craters, volcanoes, mountains, and big lava plains.
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Venus compared to Earth. Venus, Mars and Earth, three out of the four inner or 'rocky' planets of the Solar System, have a lot in common – a solid surface you could walk on, a comparable surface composition, an atmosphere and a weather system.
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Mars has weak magnetic field, has a very thin atmosphere composed of CO2, is geologically dead, has lots of craters, no plate tectonics. How are today's atmospheres of Venus and Mars similar? ... They are both composed of 95-96% CO2, with most of the rest being N2. Venus' atmosphere has 10^4 X the pressure on the surface.
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Mercury, Venus and Earth are the terrestrial planets. One of the main differences that can be seen between terrestrial and jovian planets, is their surfaces. While the terrestrial planets are made of solid surfaces, the jovian planets are made of gaseous surfaces.
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Because Venus has such a dense atmosphere which is some 100 times thicker than the earth's. Evidently, Venus is sufficiently close to the Sun that the little carbon dioxide it had in its early, Earth-like atmosphere caused the surface to warm up and leach out more carbon dioxide into the atmosphere.
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While both are terrestrial in nature, Mercury is significantly smaller and less massive than Earth, though it has a similar density. Mercury's composition is also much more metallic than that of Earth, and its 3:2 orbital resonance results in a single day being twice as long as a year.
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The answer is planet Mercury. ... So you can see that Mercury is much closer, taking only 88 days to complete an orbit around the Sun. So, Mercury is the closest planet to the Sun. And then Venus is the second closest planet to the Sun, and Earth is the third closest planet to the Sun.
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In fact, as the video above explains, Venus is actually an easier and less costly colonisation proposition than Mars is. ... Its gravity is also much more similar to Earth's than the gravity of Mars, which means colonists would likely experience less negative effects on their bones.
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Temperatures on the surface of Mercury are extreme, both hot and cold. During the day, temperatures on Mercury's surface can reach 800 degrees Fahrenheit (430 degrees Celsius).