Celebrated on January 2nd
Science fiction (often shortened to sci-fi or SF) is a kind of writing. Science fiction stories can be novels, movies, TV shows, comic books and other literature. SF is often about the future. It can be about imaginary new science and inventions such as spaceships, time machines, and robots. Science fiction stories are often in a world that is very different from the real world. They can have science and tools that do not exist in reality. Science fiction stories often take place on other worlds. There are often alien creatures.
The term "robot" wasn't invented by scientists or alien life forms. Karel Capek, a Czechoslovakian author, wrote a play in 1920 called "R.U.R. -- Rossum’s Universal Robots." Capek derived the word "robot" from a term in the Czech language that means forced labor. In his play, humans are threatened with extinction when robots try to take over the world.
One million Earths could fit inside the sun – and the sun is considered an average-size star.