Space 01
How Cold Is Space? 2.7 K, 120 °C and Everything Between
Deep space glows at 2.7 K, yet a sunlit plate near Earth hits 120 °C and ISS-height gas tops 700 K. What "the temperature of space" really means.
thermodynamics
Space 02
Why Is the Sun's Corona Hotter Than Its Surface?
The corona is 1 to 2 million K above a 5,772 K surface. Why that breaks no law of physics, how little energy it takes, and what Parker Solar Probe has found.