Who is not excited to see a sky with stars and feel for a moment part of the Universe? The contemplation of the starry sky, in addition to stealing our breath for its beauty, raises many questions .One of the most common is the question of what the stars really are, and that is why today, in Science Daily Online we want to discover with you that they are the stars , as well as share with you a series of curiosities about them that will surprise you. 128578;
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What are the Stars | All information about the Stars
1.What are the stars?
The stars are luminous plasma spheres that have their own gravity , which It allows them to keep their shape.There are those who define the stars as "the blood of our universe", since those huge plasma balls are impressive nuclear generators.
Also, the plasma is the fourth state fundamental of matter , described in the twenties that, unlike the other states of matter, is not found naturally on earth under normal conditions and is really what the stars are.
2.How are the stars?
The stars are grouped into systems, which can be binary, triple and even multiple .In them, certain stars orbit aroundone that forms the mass of gravity of the system or its focal point.Yes, the stars function as centers of gravity, which is why, in the case of our solar system, we only have one star, the Sun, and around it turn the solar planets.In our entry you can discover more Curiosities of the Solar System.
The color of the stars
If you have wondered about the color of the stars, you should know that depends on its temperature .Blue indicates more heat, since these stars emit light in a shorter and more energetic wavelength, while red is that of the coldest stars, since its wavelength is Longer.White is the intermediate and if you have seen photographs with green light stars it is simply because a particular filter with a white star has been used.
The size of the stars
The size of the stars is very variable. The smallest are the so-called neutron stars , which have a diameter of between 20 and 40 km, being remnants of supernovae. The biggest ones are the blue supergiants like Betelgeuse, now turned into a red giant, which is 1,070 times the diameter of the Sun and is in the constellation of Orion.
Our Sun is a yellow dwarf, a young star, small but very bright , being the closest bright object to Earth, so we cannot see the other stars during the day.
3.The life of a star
The life of a star is cyclic, shining in the sky from birth to death .Formed from a cloud of gas and dust, just when there is a gravitational collapse (here we explain in detail how the stars form), as it grows in age, it drops in temperature, becoming quieter when they become adult stars.Their death comes in the moment in which he has consumed all his matter, and it is a process as slow as it is fascinating.
To discover more thoroughly all the stages through which these magnificent stars pass, do not hesitate to consult our article on the Life Cycle of the stars .
4.Stars in the Sky and Stars in the Solar System.How many are there?
The stars in the sky seems infinite and, in reality, they practically are.The stars are not usually alone, but are grouped into galaxies.observable verse there are more than 100 billion galaxies and in each of them it contains hundreds of billions of stars.Although the number varies, according to astronomical studies it is believed that there may be 300 sextillions of Stars, however, all coincide in one fact: There are more stars in the Universe than grains of sand on Earth's beaches .
If you look at the sky with stars, you may ask how long they have been there.Well, most of them have been between one thousand and ten billion years in the sky .Some stars may be even older and have about 13.8 billion years which is the age of the Universe.If you want to discover more fascinating facts like these, we encourage you to know our Curiosities of the Universe.
5.How are the stars classified?
There are many types of classifications of which they are the stars, but the main classifications are established based on two criteria: according to their color (or heat) and by their life time or state of combustion of hydrogen, although both classifications are intrinsically related.Now we will explain it in greater detail.
- Spectral classification : it is the name that receives its classification according to its color and/or heat.As we said, the stars, the closer to the blue color, the hotter the more hot.There are brown, very red, red, orange, yellow, yellow-white, white, white-bluish, blue and very blue stars.The blue ones have the particular characteristic that they shine much more, but for much less time, and only From the yellow dwarfs there is the possibility of becoming red giants (later we will tell you what it means).
- Classification according to their life time : there are three main stages in the life of a star after passing the proto-phase (the phase before its birth, and which defines whether it will be a star or a cloud of gas).These three stages make them: adult star, red giant (they have burned all their hydrogen and in the future can explode as supernovae and become dwarfs black or white) and remnants of the stars.
What is a shooting star?
You may have thought that shooting stars are a specific type of The first thing you should know is that is actually a meteor, the light effect that occurs when a smaller body (pieces of stone or space dust) crosses the Earth's atmosphere .love to call them "shooting star" is scientifically incorrect since it is not a star, it is not a boiling plasma ball.Here you can tell you in greater depth What is a shooting star .
6.Curiosities of the stars
1.The closest star to the solar system is the Centeauri , one of the 3 stars that make up the Alpha-system Centauri, 40 million light years from our system; on the space shuttle, it would take 150,000 years to travel that distance, but you should know that our system is located within the galaxy of the Milky Way, with millions of stars and systems.
2.Another of the curiosities related to the stars is their movement. When asked if the stars move, you should open your mind , because the answer is not so simple: no, yes and maybe, in the first place, we could say no because the movement we appreciate from here, from Earth, has more to do with our position (given the translation and rotation of the planet) than with the stars: in this aspect, from Earth, it is we who move.
However , we can also say that the stars do move.Maybe little, but they do, which you may have deduced from the functioning of the star systems.That if, for those of us who do not study astronomy, the movement is almost imperceptible .However, even those stars that are the center of a planetary system, such as the Sun, also move but very slightly; after all, no object in outer space is static.In this article, we explain it in more detail here: Do the stars move or are they fixed?
3 .continue with the curiosities related to the stars, remind you that "we are made of stars" (as attributed to Carl Sagan) .In us we have chemical elements such as hydrogen, carbon, oxygen and other light elements, which are mainly produced in the stars.So, each of us, we are also "stars."
4 . One of the places in the world where the stars are best observed is in the Atacama desert in Chile .However, we are sure that if your country is another, you will find magical places where you can do it too.There is an international program endorsed by UNESCO and the World Tourism Organization that gives certificates to the places where they are given and especially the best conditions for observing the sky are preserved.
The project is called Strarlight and in this link of the Starlight Foundation you can consult some of the best places to contemplate the stars .South America has many spectacular sites to see stars, such as the savannas of Colombia and Venezuela, some strategic points of the Andean mountain range or a large part of both Argentine and Chilean Patagonia.
In addition to the fact that they are the Stars, do not miss…
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- If, like us, you are a great lover of the mysteries of the universe, we recommend that t and inspire with compilations of great quotes.Do not miss the best Star Phrases, inspiring Phrases of the Universe and Phrases of Heaven that make us reflect on this symbolic place.
We conclude our approach to discover that they are the stars with more clarity.We hope you have learned a lot, and we encourage you to leave all your impressions in our comments section. 128578; Do you want to give us other information that will help us understand better what stars are? Do you want to tell us some personal story that joins these stars? We will read you with great interest.
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