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Mercury is the hottest planet in the Solar System. Answer true or false.

Answer

false
hottest
highest average surface temperature of the eight planets of the Solar System
sources
science.nasa.gov, bigthink.com, en.wikipedia.org, nasa nssdc planetary fact sheets: venus (https://nssdc.gsfc.nasa.gov/planetary/factsheet/venusfact.html) gives mean surface temperature 737 k (464 c); mercury (https://nssdc.gsfc.nasa.gov/planetary/factsheet/mercuryfact.html) gives approximately 440 k (167 c), nasa planetary fact sheet (nssdc.gsfc.nasa.gov/planetary/factsheet/) and nasa solar system exploration pages: mercury's max surface temperature is ~430°c, while venus's surface temperature is ~465°c due to its thick co2 atmosphere and greenhouse effect, making venus the hottest planet despite mercury being closest to the sun., nasa planetary fact sheet, venus (nssdc.gsfc.nasa.gov/planetary/factsheet/venusfact.html): mean surface temperature about 464 c, higher than mercury's, nasa science (science.nasa.gov) planet profiles for mercury and venus: venus has a mean surface temperature of about 465 c due to its thick co2 atmosphere trapping heat, exceeding mercury's mean temperature despite mercury's closer orbit to the sun and its own peak daytime temperature of about 430 c., nasa science (science.nasa.gov/mercury and science.nasa.gov/venus): venus has a mean surface temperature of about 464°c due to its thick co2 atmosphere's runaway greenhouse effect, hotter than mercury's mean temperature of about 167°c despite mercury being closer to the sun., nasa science (venus fact sheet / planetary fact sheet): venus's thick co2 atmosphere traps heat via a runaway greenhouse effect, giving it a surface temperature around 465°c, hotter than mercury's ~430°c dayside peak despite mercury being closer to the sun and lacking an atmosphere to retain heat., nasa science (venus fact sheet / solar system exploration): venus is the hottest planet in the solar system, with an average surface temperature of about 465°c, hotter than mercury's dayside maximum of about 430°c, because venus's thick co2 atmosphere traps heat via a runaway greenhouse effect while airless mercury cannot retain heat., nasa science, 'venus' (https://science.nasa.gov/venus/): "it's the hottest planet in our solar system." corroborated by wikipedia, 'venus' (https://en.wikipedia.org/wiki/venus): surface temperature 737 k (464 c), "making it the hottest planet in the solar system"., nasa science, mercury facts (https://science.nasa.gov/mercury/facts) and space.com, 'how hot is mercury?' (https://www.space.com/18645-mercury-temperature.html): venus is the hottest planet, averaging about 462 c (864 f) due to its dense co2 atmosphere; mercury reaches about 430 c by day but drops to about -180 c at night, nasa science, mercury facts, https://science.nasa.gov/mercury/facts/ (accessed 2026-10-04): states mercury is not the hottest planet in the solar system; venus is., nasa science, solar system temperatures (https://science.nasa.gov/resource/solar-system-temperatures); universe today, temperature of the planets (https://www.universetoday.com/35664/temperature-of-the-planets/), nasa science, solar system temperatures (https://science.nasa.gov/resource/solar-system-temperatures/); nasa science, mercury: facts (https://science.nasa.gov/mercury/facts/), nasa science, solar system temperatures (https://science.nasa.gov/resource/solar-system-temperatures/); nasa science, venus: facts (https://science.nasa.gov/venus/venus-facts/), nasa science, solar system temperatures (science.nasa.gov/solar-system/temperatures-across-our-solar-system): venus is the hottest planet (about 465-475 c mean surface temperature); mercury's day side reaches about 427 c but its night side drops to about -173 c, so its average is lower, nasa science, solar system temperatures: https://science.nasa.gov/resource/solar-system-temperatures/, nasa science, solar system temperatures: https://science.nasa.gov/resource/solar-system-temperatures/ — states venus is the hottest planet and gives mean surface temperatures of 464°c for venus and 167°c for mercury., nasa science, temperatures across our solar system: https://science.nasa.gov/solar-system/temperatures-across-our-solar-system/, nasa science, venus (https://science.nasa.gov/venus/): "venus is the second planet from the sun... it's the hottest planet in our solar system.", nasa science, venus facts page (https://science.nasa.gov/venus/facts/): venus is the hottest planet in the solar system, with surface temperatures about 872 f (467 c); mercury is named as cooler than venus., nasa science, ‘mercury: facts’ (https://science.nasa.gov/mercury/facts/), which states mercury is not the hottest planet and that venus holds that title., nasa solar system exploration (https://science.nasa.gov/mercury/) and nasa venus fact sheet (https://science.nasa.gov/venus/) state venus is the hottest planet, with a mean surface temperature around 464°c/867°f, due to its thick co2 atmosphere trapping heat via a runaway greenhouse effect, despite mercury being closer to the sun., nasa solar system exploration (https://science.nasa.gov/mercury/) and nasa venus fact sheet (https://science.nasa.gov/venus/): venus has an average surface temperature of about 464°c, hotter than mercury's average of about 167°c, because venus's dense co2 atmosphere traps heat via a runaway greenhouse effect, while mercury has essentially no atmosphere and radiates heat away quickly despite being closer to the sun., nasa solar system exploration (https://science.nasa.gov/mercury/) and nasa venus fact sheet: venus is the hottest planet, with an average surface temperature of ~464°c, due to its thick co2 atmosphere trapping heat via the greenhouse effect; mercury, despite being closest to the sun, has no atmosphere to retain heat and averages ~167°c., nasa solar system exploration (https://science.nasa.gov/venus/) and nasa/nssdc planetary fact sheets: venus has the highest average surface temperature (~465°c) of any planet due to its thick co2 atmosphere's greenhouse effect, exceeding mercury's peak dayside temperature (~430°c) despite mercury's closer proximity to the sun., nasa solar system exploration (https://solarsystem.nasa.gov/planets/venus/overview/) and nasa mercury fact sheet: venus has the highest average surface temperature (~464°c) of any planet due to its thick co2 atmosphere and greenhouse effect, exceeding mercury's average surface temperature (~167°c) despite mercury being closer to the sun., nasa solar system exploration (https://solarsystem.nasa.gov/planets/venus/overview/) and nasa mercury fact sheet: venus's thick co2 atmosphere traps heat via a runaway greenhouse effect, giving it a surface temperature of about 464°c, hotter than mercury's peak dayside temperature of about 427°c, despite mercury being closer to the sun., nasa solar system exploration (https://solarsystem.nasa.gov/planets/venus/overview/) and nasa science mercury facts (https://science.nasa.gov/mercury/) both state venus is the hottest planet (mean surface temperature ~465c / 864f due to its dense co2 atmosphere and greenhouse effect), while mercury's lack of atmosphere causes it to radiate heat away, giving it a lower mean temperature (~167c) despite closer solar proximity., nasa solar system exploration (https://solarsystem.nasa.gov/planets/venus/overview/) and nasa science/venus fact sheet: venus, not mercury, is the hottest planet (~465°c average surface temperature) due to its thick co2 atmosphere trapping heat in a runaway greenhouse effect, despite mercury being closer to the sun., nasa solar system exploration (science.nasa.gov/mercury and science.nasa.gov/venus): despite mercury being closest to the sun, venus has the highest surface temperature (~465°c average) due to its dense co2 atmosphere trapping heat via a runaway greenhouse effect, versus mercury's lack of atmosphere giving it no heat retention and a much lower average temperature (~167°c), making venus the hottest planet, not mercury., nasa solar system exploration (science.nasa.gov/mercury and science.nasa.gov/venus): venus's average surface temperature (~464°c) exceeds mercury's (~167°c average, despite higher daytime peaks) because venus's thick co2 atmosphere traps heat via the greenhouse effect; venus, not mercury, is the hottest planet., nasa solar system exploration (science.nasa.gov/venus and science.nasa.gov/mercury): venus has an average surface temperature of about 465°c due to its thick co2 atmosphere and greenhouse effect, making it the hottest planet, while mercury, despite being closest to the sun, reaches about 430°c at its hottest but drops to -180°c at night, giving it a much lower average temperature than venus., nasa solar system exploration (science.nasa.gov/venus and science.nasa.gov/mercury): venus's mean surface temperature is about 464°c / 867°f, hotter than mercury's ~430°c / 800°f dayside peak, because venus's thick co2 atmosphere traps heat via a runaway greenhouse effect while mercury has essentially no atmosphere to retain heat., nasa solar system exploration (science.nasa.gov/venus) and nasa mercury fact sheet (nssdc.gsfc.nasa.gov/planetary/factsheet/mercuryfact.html): venus has a mean surface temperature of about 465°c due to its thick co2 atmosphere and greenhouse effect, making it the hottest planet, while mercury's surface averages about 167°c (with large day/night swings up to ~430°c/-180°c) despite being closest to the sun., nasa solar system exploration (science.nasa.gov/venus) and nasa mercury fact sheet (nssdc.gsfc.nasa.gov/planetary/factsheet/mercuryfact.html): venus has an average surface temperature of ~464°c, higher than mercury's average of ~167°c, because venus's thick co2 atmosphere traps heat via a runaway greenhouse effect even though mercury is closer to the sun., nasa solar system exploration (science.nasa.gov/venus) and nasa/goddard planetary fact sheets: venus has an average surface temperature of ~464°c, hotter than mercury's ~430°c maximum, due to venus's thick co2 atmosphere trapping heat via the greenhouse effect, despite mercury being closer to the sun., nasa solar system exploration (science.nasa.gov/venus) and nasa/jpl fact sheets: venus has an average surface temperature of about 464°c, hotter than mercury's ~430°c dayside peak, because venus's thick co2 atmosphere traps heat via a runaway greenhouse effect despite mercury being closer to the sun., nasa solar system exploration (venus profile): venus has a mean surface temperature of about 464°c due to its thick co2 atmosphere and runaway greenhouse effect, making it the hottest planet despite mercury being closer to the sun; mercury's mean surface temperature is about 167°c, with no atmosphere to retain heat, so it is cooler than venus., nasa solar system exploration (venus profile): venus's average surface temperature is about 465 degrees c, hotter than mercury's ~430 degrees c, because venus's thick co2 atmosphere traps heat via the greenhouse effect even though mercury is closer to the sun., nasa solar system exploration (venus profile, science.nasa.gov/venus): venus is the hottest planet in the solar system, with a mean surface temperature around 464°c/867°f, hotter than mercury despite mercury being closer to the sun, because venus's thick co2 atmosphere traps heat via a runaway greenhouse effect., nasa solar system exploration (venus profile: https://science.nasa.gov/venus/) — venus's thick co2 atmosphere causes a runaway greenhouse effect giving it the hottest mean surface temperature (~465°c), exceeding mercury's (~430°c peak daytime, but no atmosphere to retain heat, with much colder nighttime/mean temperatures)., nasa solar system exploration planet fact sheets (venus and mercury pages): venus mean surface temperature about 464-467 c, the hottest planet due to its co2 greenhouse atmosphere; mercury has no atmosphere to retain heat and reaches about 430 c at most., nasa solar system exploration planet fact sheets: venus has the highest surface temperature (~465°c) of any planet due to its thick co2 atmosphere's greenhouse effect, exceeding mercury's peak dayside temperature (~430°c) despite mercury's closer proximity to the sun., nasa solar system exploration planetary fact sheets (mercury and venus): venus mean surface temperature about 464 c (737 k) versus mercury daytime maximum about 430 c and nighttime minimum about -180 c; venus is the hottest planet because of its co2 greenhouse atmosphere. corroborated by nasa venus overview page., nasa solar system exploration planetary fact sheets: venus mean surface temperature about 464-465 c; mercury surface temperature about -180 c to 430 c (day side maximum), mean well below venus's, nasa solar system exploration, 'venus facts' (science.nasa.gov/venus): venus is the hottest planet, with a mean surface temperature of about 464°c, hotter than mercury despite being farther from the sun, because venus's thick co2 atmosphere traps heat via a strong greenhouse effect while mercury has essentially no atmosphere to retain heat., nasa solar system exploration, 'venus facts' (science.nasa.gov/venus/venus-facts): venus is the hottest planet in the solar system with an average surface temperature of about 464°c, due to a thick co2 atmosphere trapping heat via the greenhouse effect, even though mercury is closer to the sun., nasa solar system exploration, venus fact sheet (https://science.nasa.gov/venus/): venus is the hottest planet in the solar system, with a mean surface temperature of about 464°c, due to its dense co2 atmosphere trapping heat via the greenhouse effect, despite mercury being closer to the sun., nasa solar system exploration, venus fact sheet (https://science.nasa.gov/venus/facts/) and mercury fact sheet (https://science.nasa.gov/mercury/facts/): venus, not mercury, is the hottest planet, with a surface near 465 c, while mercury's day-side reaches about 430 c, nasa solar system exploration, venus fact sheet (mean surface temperature about 465 c) and mercury fact sheet (day-side surface up to about 430 c, night-side about -180 c; mean far below venus), nasa solar system exploration, venus fact sheet (nssdc.gsfc.nasa.gov/planetary/factsheet/venusfact.html): venus, not mercury, is the hottest planet, with a mean surface temperature of about 464 c owing to its carbon dioxide atmosphere's greenhouse effect, nasa solar system exploration, venus fact sheet (science.nasa.gov/venus): venus has a mean surface temperature near 465 c, hotter than mercury's daytime maximum of about 430 c, due to its co2 greenhouse atmosphere, nasa solar system exploration, venus overview (https://science.nasa.gov/venus/) and nasa mercury overview (https://science.nasa.gov/mercury/), both stating venus is the hottest planet (~465°c average surface temperature due to its thick co2 atmosphere and runaway greenhouse effect) despite mercury being closer to the sun., nasa venus fact sheet (https://nssdc.gsfc.nasa.gov/planetary/factsheet/venusfact.html) and nasa solar system exploration venus facts (https://science.nasa.gov/venus/facts/): venus has the hottest surface of any planet, about 465 c, due to its runaway greenhouse atmosphere; mercury, the closest planet to the sun, is not the hottest, nssdc.gsfc.nasa.gov, wikipedia, "venus" (en.wikipedia.org/wiki/venus): "at the mean surface level, the atmosphere reaches a temperature of 737 k, making it the hottest planet in the solar system.", www.popsci.com

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    #1271falsefrom science.nasa.gov
    #626falseNASA Planetary Fact Sheet (nssdc.gsfc.nasa.gov/planetary/factsheet/) and NASA Solar System Exploration pages: Mercury's max surface temperature is ~430°C, while Venus's surface temperature is ~465°C due to its thick CO2 atmosphere and greenhouse effect, making Venus the hottest planet despite Mercury being closest to the Sun.
    #103falsefrom science.nasa.gov
    #786falsefrom science.nasa.gov
    #174falsefrom science.nasa.gov
    142 more
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