The universe encompasses everything. It encompasses all of space as well as all of the stuff and energy contained inside it. It even encompasses time itself, as well as, of course, you. Earth and the moon, as well as the other planets and their many dozens of moons, are all part of the cosmos. So is the entire universe beyond what we can see? Yes, absolutely! Everything that exists is part of the universe.
Our galaxy is called the Milky Way. It's a spiral shape with hundreds of billions of stars within it. Each one produces its own gravitational field which causes other stars to move around it in elliptical orbits. Some of these stars are like our sun while others are like red giants or supernovas. There have been observations made of stars exploding as supernovas after becoming too heavy for their cores to support themselves any longer. These explosions release a huge amount of energy which causes changes to be seen across the universe: galaxies move away from star bursts because their gravity is no longer strong enough to hold them together, and light beams are emitted into space when particles escape the explosion.
So everything that exists is connected to each other and affects each other throughout eternity. This is why scientists believe that at some point in the past everything was created by something else which they call "the Big Bang". After the Big Bang there were only atoms with electric charges that constantly moved around due to quantum effects.
Planets, like asteroids and comets, circle the Sun. But they do not go around it; instead, they orbit it. A planet is a large body that orbits the sun. Other objects such as dwarf planets, satellites, and meteorites are also considered planets.
Planets were originally defined as the only bodies other than stars that exert a significant influence on their environments. This definition was later revised to include stellar masses less than our Sun's because many factors affect the evolution of a star. These include its mass, how far from the center it is located, and how enriched it is with heavy elements. Jupiter, for example, has an enormous influence on the evolution of Saturn, Uranus, and Neptune because it is so massive compared to them all combined. The same is true of the Sun because of its mass comparison to those of its planets.
The term "planet" is used to describe any object that circles a star as its home. However, this term does not apply to all such objects. For example, objects called "asteroids" are often thought to be rocky remnants of once-larger planets, but this is just a guess for most of them.
Everything we can touch, feel, experience, measure, or detect is part of the cosmos. Living organisms, planets, stars, galaxies, dust clouds, light, and even time are all part of it. Time, space, and matter did not exist before to the beginning of the Universe. Nothing existed except for energy that exploded into existence 14 billion years ago in a great cosmic fireball known as the Big Bang.
Our understanding of the cosmos has evolved through trial and error. Scientists make predictions about what might happen based on their knowledge of physics and chemistry and test these ideas by doing experiments. They may use tools such as microscopes, telescopes, and particle accelerators to explore how things work at the smallest scale (nanoscale) and largest scale (macroscale).
Modern science began in Europe around the 1550s with the work of people such as Tycho Brahe, Johannes Kepler, and Isaac Newton. In America, William Herschel invented the first telescope in 1714. Joseph Priestley discovered oxygen in 1775. Michael Faraday identified electricity as the driver behind many natural processes in 1831. Albert Einstein developed the theory of relativity in 1905. Science continues to reveal new information about the cosmos every day.
So, everything we can touch, feel, experience, measure, or detect is part of the cosmos.
The Universe is the whole cosmic system of matter and energy, of which Earth and, by extension, the human species are a part. Humanity has come a long way since cultures saw the Earth, Sun, and Moon as the primary objects of creation, with the rest of the cosmos emerging almost as an afterthought. Today, most people believe that our galaxy is just one among many in a vast universe that includes hundreds of billions of other galaxies. The idea of the Universe was first proposed by Aristotle and Pythagoras.
Aristotle believed that the earth was the center of the universe and that all movement including that of stars and planets was due to collisions with other planets or spheres within the earth. He also believed that there were infinite worlds like ours but out of reach because they were beyond the orbit of Mars. His ideas were later challenged by Plato who argued that the universe consisted of a single world-plane with several islands or "heavens" within it. Plato's theories were later adopted by Christianity where he is regarded as one of the three greatest philosophers of all time along with Aristotle and Socrates.
In 632 AD, Japanese Buddhist monk Nam-sunim created a paradigm shift when he suggested that our planet is only a small part of a larger universe that contains many solar systems with life capable of developing intelligence. This idea became known as "the theory of cosmic harmony" and was popular among Asian artists and philosophers.
The universe (universus) encompasses all of space and time, as well as their contents, which include planets, stars, galaxies, and all other forms of matter and energy. The Big Bang theory is the most widely accepted cosmological explanation for the evolution of the universe. It states that in the first few minutes after the creation of the universe, its entire mass was compressed into a tiny volume at infinite temperature and density. The expansion of the universe has since cooled it down enough for atoms to form, resulting in the material that constitutes today's galaxies. Galaxies themselves are made up of billions of stars and gas clouds called galaxies.
When talking about the universe, what we mean by it is the collection of all objects and phenomena. So the answer to the question "What is the universe called?" is simply "it" or "everything." There is no single word that can fully describe everything about the universe; instead, we use phrases like "the cosmos" or "galaxy night skies" to refer to large regions of space containing many stars and galaxies.
In mathematics, physics, and astronomy, a vacuum is the state of a space that contains no particles, such as electrons or atoms. In physics, chemistry, and astronomy, a vacuum is often used to describe a region of space that contains very few particles compared with those found in ordinary air.