Illustration of the surface of the Sun as the central star in our solar system
Netgenz - Sains | When we turn our heads to the sky at night, the stars are certainly one of the earliest visible celestial bodies. Since the beginning of space exploration by humans, stars have become one of the most interesting objects to study. Because this celestial object has many events that are difficult to explain or even difficult to predict by humans. In addition to the relatively far distance from Earth, the stars in the sky have enormous energy and size, so it takes the most advanced technology to pay attention to a star. However, at least there is a line of interesting evidence from this one celestial body that has been successfully uncovered by several researchers.
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Want to know the evidence of this giant celestial body? Check out the following article!
1. There are several stars in the universe so that they cannot be counted with exact numbers
illustration of a galaxy consisting of billions of stars in it
Despite having a giant size, stars are not the largest natural objects in the world. The stars in the sky are counted as galaxies that are larger than stars. And of course, in a galaxy alone, there can be millions or even billions of stars in it. Quoted by National Geographic, stars as celestial bodies as a separator between one galaxy to another. Some researchers predict that there are billions of galaxies in the universe. Interestingly in the Milky Way Galaxy, it is predicted that there are 300 billion stars! Then it is certainly impossible to predict in a precise way the stars in the universe.
2. Stars are made of dust clouds that surround the galaxy
illustration of a dust cloud in the form of a disk with a round core in the middle
In the process of formation, stars actually consist of a lot of hydrogen and helium. The two substances are in a giant dust cloud that will continue to swirl and decrease while continuing to be attracted to the center until it forms a disk with a hot ball in the middle. Stars website says if the process makes giant clouds become protostars. Furthermore, when the pressure and temperature in the middle of the clump touch the number 1 million Celsius, the main atoms in it will be together until the star has a certain size with a certain intensity of light as well.
3. Stars have a productive period
Illustration of Energy Rays from a Star
In addition to having its own birth process, the life transition from the star is like a living thing. Stars experience a productive period, an old period until later the star dies after living for a certain time. NASA released, to predict the age of a star can be used Hertzsprung-Russell Graph which calculates the age of a star based on the amount of radiation energy released and the color of the light made. If the surface temperature of a star can still emit large amounts of radiant energy and has constant nuclear fusion, it can be confirmed that the age of the star is still in its productive period. The sun itself takes 50 billion years to reach its productive age. NASA researchers predict that the perfect age of the Sun is about 10 billion years back before the last time it got old and erupted.
4. The temperature of the star can be seen from the color of the light it produces
The appearance of Star AG Carinae, a Star that has Blue Light
When watching the starlight from Earth, it may be difficult to notice the true color of the star. Because, several factors make it difficult for our eyes to see the true color of the star, such as the distance from the star or there is the atmosphere that filters the light from the star. In fact, the color of the light can be one of the determinants of the temperature released by the star, you know. Launched by National Geographic, stars with high temperatures will generally emit white and blue colors. And a star with a cooler temperature will have a red or orange color.
5. Star Size is very Diverse
Star Size is very Diverse
Similar to other celestial objects, stars have different sizes. The size of a star is the basis of whether the star can live long or not. Because stars of the same size as giants tend to have shorter life periods than stars that have smaller sizes. Earth Sky website released, so far there are 3 size groups of stars, namely dwarf stars, large stars, and giant stars. Dwarf stars are generally a group of stars that exist in the productive period. And stars have large sizes and giants generally have entered old age. In terms of size and productive period, our Sun can actually be classified as a dwarf star.
6. The origin of naming a star can come from various types of things
Illustration of the Stars in the Night Sky
The assessment of the problem of stars has actually been carried out by humans since several thousand years ago. In the past, humans called a star based on a constellation, a schema that visualizes a particular person, animal, or object. As time goes by, now naming a star can come from a variety of things. Quoted from the Ruang site, some stars are named after the Greek language accompanied by numbers, such as Alpha Centauri and Gamma. The use of Arabic was also used to refer to stars, such as Betelgeuse. In addition to using a specific language, researchers now have a special list as a code to name recently observed stars.
For example, there is The Henry Draper Catalog which mentions stars with codes based on spectral categorization and range of distances from a star. And the International Astronomical Union (IAU) mentions new stars based on the abbreviation that represents the star or a list containing information about the star followed by giving the symbol in its name. Of course, there is still a lot of interesting evidence of this celestial body that can be studied by humans.