The Universe is defined as everything that physically exists: the entirety of space and time, all forms of matter, energy and momentum, and the physical laws and constants that govern them. However, the term Universe may be used in slightly different contextual senses, denoting such concepts as the cosmos, the world or Nature. Current interpretations of astronomical observations indicate that the age of …
Before long, though, it wouldn’t be so fun. You’d soon need to keep a fire going around the clock, because Earth would become a much colder place without the Sun’s heat. In addition, food would become scarce over time, since plants wouldn’t grow without the sunlight they need for photosynthesis. The Sun’s energy also powers …