- What are the stars?
- Astros of the Solar System
- Stars
- Planets
- Satellites
- Kites
- Asteroids
- Meteoroids
- Nebulae
- Galaxies
We explain what the stars are and which are the stars of the Solar System. In addition, the types of stars that exist and their characteristics.
What are the stars?
It is known as stars, or more formally as celestial bodies, the various physical entities existing in the universe, from an astronomical perspective. In strict terms, the stars are singular, unique elements, whose existence is supposed or has been verified by means of Scientific methods from observation space; for that reason they constitute a category of astronomical objects, among which there may be multiple objects, such as planetary rings or asteroid belts, made up of many different elements.
The elements that exist in outer space to our planet have fascinated the humanity since ancient times, and much effort has been devoted to their observation and understanding, through telescopes, space probes and even a manned trip to the Moon. Thanks to those efforts, we have been able to get to know a lot about the other worlds that exist, the galaxy that hosts them and the universe infinity that contains everything.
However, not all existing stars are visible to the naked eye, not even with the help of an ordinary telescope. Others even require special scientific apparatus or their presence can only be deduced by the physical effects to which they subject other bodies around them.
Astros of the Solar System
The Solar system, as we know, is the name given to the neighborhoods of our Sun, the star around which the planets orbit and other elements that make up a sort of ecosystem immediate spatial. It extends from the Sun itself at its center, to the outer edges where there are clouds of mysterious objects, known as the Oort Cloud and the Kuiper Belt. The length from the Solar System to its last planet (Neptune) exceeds 4,500 million kilometers, equivalent to 30.10 Astronomical Units (AU).
In the Solar System there are a diverse number of stars, such as:
- 1 star. Sun.
- 8 planets. Mercury, Venus, the earth, Mars, Jupiter, Saturn, Uranus, Neptune.
- 5 dwarf planets. Pluto, Ceres, Eris, Makemake, and Haumea.
- 400 natural satellites.
- 3153 kites.
Stars
The stars are incandescent balls of gas Y plasma, that due to its force of gravity they are kept in a perpetual state of explosion by atomic fusion. This explosion generates huge amounts of light, electromagnetic radiation and even matter, as the atoms Hydrogen and helium in its interior become heavier elements, like those that make up our planet. d
Stars can be of different types, depending on their size, atomic content and the color of the light of their incandescence. The closest to our planet and known is the Sun, although at night a variable number of stars can be seen in the distance of the sky. There are an estimated 250,000 million stars in our galaxy.
Planets
The planets They are bodies of variable size and rounded shape, formed from the same gaseous matter that gave rise to the stars or that came from them, but infinitely colder and more condensed, thus acquiring different physical and chemical properties. There are gaseous planets (like Jupiter), rocky planes (like Mercury), frozen planets (like Neptune), and there is Earth, the only planet with Water liquid in enormous quantities, and therefore the only one with lifethat we know of.
According to their size, one can also speak of dwarf planets: some that are too small to rub shoulders with ordinary planets, but at the same time too big to be considered asteroids, and that also lead an independent existence, that is, they are not satellites from no one.
Satellites
Orbiting around the planets, it is possible to find similar but much smaller stars, which are attracted by their gravity they stay in more or less close orbits, without falling into them or moving away altogether.
Such is the case of the only satellite of our planet: the Moon, and of the numerous stars of other major planets, such as the moons of jupiter, estimated today at about 79. These satellites could have the same origin as their associated planet, or they could come from other origins, only to get hooked on the gravitational force that keeps them in orbit.
Kites
Comets are the various mobile celestial bodies, composed of ice, dust and rocks of different origin. These bodies orbit the Sun in elliptical, parabolic, or hyperbolic orbits, and they are recognizable because, as they approach the star, the heat melts its ice sheets and gives it a very distinctive gaseous "tail." The kites known are part of the Solar System and have predictable trajectories, such as the famous Halley comet, which happens by our side every 76 years.
The exact origin of comets is unknown, but everything indicates that they could come from groups of trans-Neptunian objects, such as the Oort Cloud or the Kuiper Belt, located about 100,000 AU from the Sun, at the limits of the Solar System.
Asteroids
The asteroids are rocky objects of diverse composition (generally metallic elements or minerals) and irregular shape, much smaller than a planet or a satellite.
Devoid of atmosphereMost of those that make life in our solar system are forming a great belt between Mars and Jupiter, thus separating the inner planets from the outer ones. Others, on the other hand, roam through space and can traverse each other in planetary orbits, or become satellites of some major star.
Meteoroids
This is the name given to the smaller bodies in our Solar System, less than 50 meters in diameter, but greater than 100 micrometers (and therefore larger than cosmic dust).
They can be fragments of comets and asteroids that have been wandering, and that can very well be attracted by the gravity of the planets, entering their atmosphere and becoming meteorites. When the latter occurs, the heat of friction against the air Atmospheric heats them up and totally or partially vaporizes them. And in some cases, fragments of the meteor can hit the Earth's surface.
Nebulae
Nebulae or nebulae are clusters of gas, mainly hydrogen and helium, as well as cosmic dust and other elements, that are scattered in space, held more or less in place by gravitational forces. Sometimes the latter will be intense enough to begin to compact all this stellar material and, in this way, give rise to new stars.
In turn, these gas clusters can be the product of the destruction of a star, such as a supernova, or the agglomeration of excess material from the process of production of young stars. The closest nebula to Earth is the Helix Nebula, located 650 light-years from the Sun.
Galaxies
Star clusters, each perhaps with its own solar system, constitute, together with nebulae, cosmic dust, comets, asteroid belts and other celestial objects, larger units known as galaxies.
According to the number of stars that make up a galaxy, we can speak of dwarf galaxies (107 stars) or giant galaxies (1014 stars); but we can also classify them according to their apparent shape, into spiral galaxies, elliptical galaxies, lenticular galaxies and irregular galaxies.
The galaxy in which our solar system is located is the Milky Way, named after the mother's milk of Goddess Hera from the pantheon of Ancient Greek civilization.