Astronomy has made great discoveries in recent years in exploring the origin of the universe.
Nowadays we know much more about stars, galaxies, black holes, new planets, among other celestial bodies observable in the universe.
So, let’s explain what astronomy is and a little more about what’s in the observable universe.
What Is Astronomy And What Does It Do?
In fact, Astronomy is the natural science that studies phenomena that occur outside the planet earth, such as, for example, cosmic radiation, celestial bodies, comets, stars, planets, galaxies, among others.
As it is a science that studies the stars, it starts to seek comprehensive knowledge about all matter and energy existing in the universe.
In fact, as much as astronomy has advanced very fast in recent years, our conception of the universe is still small in relation to its size.
Origin Of The Universe
As we have already seen, the universe is composed of several elements and is a huge place and for many astronomers, infinite. The Latin word universum means “all in one” or “whole”.
Therefore, there are several theories about the origin of the universe, but the model supported and accepted by scientists is the famous “Big Bang Theory”.
According to the theory, 14 billion years ago, it hears a big explosion of a single and small particle, called primordial atom.
Big Bang – Origin of the Universe
In which it caused a cosmic cataclysm, thus generating the entire origin of the observable universe. This theory also reinforces that the Universe is in continuous expansion.
Some Elements Of The Universe
The celestial bodies of the universe are many, but we have separated the main ones briefly.
Stars | They have their own light and heat and have a spherical plasma shape. Our sun, for example, is a star.
Planets | They are solid and rounded and have no heat of their own. However, each planet has its own gravity. Planets orbit around the sun
Galaxies | It is the set of stars, planets and gases. Our planet Earth is located in the Milky Way galaxy. There are approximately 100 billion galaxies in the universe.
Satellites | They are solid celestial bodies that orbit the planets. There may be natural satellites, such as the Moon, or natural satellites such as Sputnik.
Comets | They are celestial bodies with little mass and irregular orbit. A very famous one is Comet Halley, visible in many places in the world with the naked eye and telescope.