What is the world outside the solar system? What s in the solar system?

The solar system is a system of celestial bodies made up of the Sun and the celestial bodies that orbit it under its gravitational pull. It includes the Sun, the eight planets and their moons, dwarf planets, asteroids, comets, meteoroids, and interstellar matter. The celestial bodies in the solar system are mainly composed of gases such as hydrogen, helium, and neon, ice (water, ammonia, methane), and rocks containing elements such as iron, silicon, and magnesium.

Eight large planets have been discovered in the solar system so far. In order of distance from the Sun, the eight planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Mercury, Venus, Earth, and Mars are known as terrestrial planets; Jupiter and Saturn are known as giant planets; Uranus and Neptune are known as the perihelio-solar planets.

With the exception of Mercury and Venus, all other planets have moons. Between Mars and Jupiter, there are hundreds of thousands of asteroids of various sizes and shapes, and astronomers refer to this region as the asteroid belt. In addition, there are more than 1,000 comets in the solar system, as well as countless small celestial bodies such as dust, ice masses, and debris.

Beyond the solar system, there is the world of the Milky Way.

The Milky Way is a flattened galaxy with more than 200 billion stars and countless planets, and beyond the universe, it is actually our distorted three-dimensional universe, because galaxies, especially the traction of black holes, will cause subtle space distortions, and some small distortions will eventually connect the ends of the two sides of the universe to form a distorted and connected three-dimensional universe.

The Milky Way, also known as Yinhan, Tianhe, Milky Way, Galaxy, Tianhan, etc., is the barred spiral galaxy where the solar system is located, including 1000 to 400 billion stars and a large number of star clusters, nebulae and various types of interstellar gas and interstellar dust. With a total mass of about 210 billion times that of the Sun, it belongs to the local group of galaxies, and the nearest extragalactic galaxy is the Andromeda Galaxy, 2.54 million light-years away from the Milky Way.

In 1977, the United States successfully launched Voyager 1, which is currently the farthest probe and the first probe to provide a clear ** of Jupiter and Saturn.

Voyager 1 carried a copper-plated disk record and a diamond phonograph needle, and even after 1 billion years, the sound quality of the record would not have changed.

It is possible to maintain contact with Earth now, but after 2025, Voyager 1 will completely lose contact with Earth and become a "wandering probe" floating in the universe.

Seeing the ** taken back by the traveler, the earth is like a speck of dust, you can imagine how big the universe is.

With the development of observation technology, the boundaries of the solar system may be larger than we think, and a new spherical cloud has been observed in the outer part of the heliosphere, named the Oort cloud.

In 1932, the Estonian astronomer Ernst Julius said that all the comets we have observed by humans may come from an unknown object in the outer layers of the solar system.

It is possible that humans will not be able to fly out of the solar system, and according to observations, the extent of the Oort cloud is about 1 light-year to light-years from the Sun.

The fastest human vehicle is the Parker Solar System Probe, which reaches a speed of 800,000 kilometers per hour (7 billion kilometers in one year), and even at such a speed, it would take a full 2,700 years to cross the Oort Nebula.

So it's basically impossible to fly out of the solar system, think about the meaning of life, the rules of the universe, maybe it's like there are more advanced civilizations in the Marvel movie, everything is unknown, and cognition is limited to this, so you can only see the solar system and believe that the outside world is more exciting.