Have you ever wondered why space is so cold even though the Sun is incredibly hot? It's a question that has puzzled many people, and the answer is a bit more complex than you might think. The Sun's Heat and Space's Cold While the Sun's core reaches temperatures of over 15 million degrees Celsius, its surface (the photosphere) is significantly cooler at around 5,500 … [Read more...] about If The Sun Heats The Earth, Why Is Space Cold?