universe
The universe encompasses everything that exists: all matter, energy, planets, stars, galaxies, and even the space between them. It began about 13.8 billion years ago with the Big Bang, an enormous explosion that created space and time. The universe is ever-expanding, meaning galaxies are moving away from each other. It contains billions of galaxies, each with millions or even billions of stars. Within this vastness, scientists study phenomena like black holes, dark matter, and cosmic radiation to understand the fundamental laws governing existence. The universe invites exploration, raising profound questions about our origins and place within it.
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The universe is everything that exists, encompassing all matter, energy, planets, stars, galaxies, and even space itself. It began about 13.8 billion years ago with the Big Bang, an enormous explosion that marked the start of space and time. The universe is constantly expanding, with galaxies moving further apart. It contains billions of galaxies, each with millions or billions of stars. The study of the universe, including its origins and structure, is the field of cosmology. Understanding the universe helps us explore fundamental questions about existence, life, and the laws of nature.