Red sky paradox
5 min readMar 8, 2022
Why isn’t the sky above us red? This is known as the “red sky paradox.” Most stars in our galaxy are red dwarfs. So, scientists wonder why life arose near a yellow rather than red sun.
Our Sun will use up all its hydrogen in about four billion years and start burning helium. It will then expand to the size of a red giant and will probably consume first Mercury, then Venus, and possibly the Earth. Civilization, if it still exists, will…
