space.com
space.com
science.nasa.gov
Science Mission Directorate
https://science.nasa.gov › resource › solar-system-temperatures
largestandbiggest.com
universetoday.com
planetfacts.org
Planet Facts
https://planetfacts.org › temperature-on-neptune
reference.com
sciencing.com
en.wikipedia.org
answers.com
opticsmag.com
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