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🌡 Temperatures of the Planets
Source: NASA Planetary Fact Sheet

Planet Average Temperature (°C)

Mercury 167
Venus 464
Earth 15
Mars -65
Jupiter -110
Saturn -140
Uranus -195
Neptune -200


❄ Boomerang Nebula – The Coldest Place in the Universe

Type: Protoplanetary nebula (transition stage from a dying star to a planetary nebula)

Location: Constellation Centaurus, about 5,000 light-years from Earth

Temperature: Just 1 Kelvin (–272.15 °C / –458 °F), making it the coldest natural place known — even colder than the cosmic microwave background (~2.7 K)

Reason for Extreme Cold: Gas is expanding at incredible speeds (hundreds of km/s), causing extreme adiabatic cooling