Summary designation of all matter, energy and space-time. It includes all the stars, planets, interstellar space, but also the still mysterious dark matter.
According to the prevailing theory, the universe was created by the so-called Big Bang and has been constantly expanding ever since, and this will continue until the trend reverses and the universe shrinks back. The age of the universe is estimated at less than 14 billion years. Due to the lifespan of the sun, our planet will probably not survive its shrinkage.
