The Stars are celestial bodies that have their own light. They are actually giant spheres composed of gases that produce nuclear reactions but, thanks to gravity, can stay alive (without exploding) for trillions of years.
In our galaxy - the Milky Way - there are more than one hundred billion stars. The Sun is one of them.
How are Stars Born?
At nebulae (clouds formed of dust and gas) contract and form a sphere. When contracting, the gas slowly concentrates and heats millions of degrees, in a violent process that can take millions of years.
Thus, a protostar and only after reaching a very high temperature do the nuclear reactions that result in stars begin.
star formation
The Size of Stars
To get an idea of the size of stars, know that the Sun is a small star. However, it has a diameter of 1.5 million kilometers (which equates to about 1 million Earth planets).
Stars bigger than the Sun
The star Yeahcarinae it is 5 million times larger than the Sun.
Meanwhile, the star betelgeuse, in turn, is 300 times greater than the Yeahcarinae.
The star VYKennelsMajoris, finally, is 1 billion times larger than the Sun, thus being the largest of them.
The Colors of the Stars
There are red, yellow, white and blue stars. Stars emit different colored lights because of their temperature.
The red ones, with about 3000º C, are the ones that have the lowest temperature; while at around 40000º C the blue ones have the highest temperature.
constellations
Constellations are a set of stars that, although they appear close to the naked eye, are extremely distant in celestial space.
Among the main constellations of the universe seen from Earth, the most popular are:
cruiseofSouth, which is seen from the southern hemisphere.
BearBigger and BearSmaller, which are seen from the northern hemisphere.
How about reading too Main Constellations?
Do Stars Die?
Stars die after using up their fuel - the larger their size, the more fuel they consume.
First, stars use up hydrogen, and when that happens, stars age. Then they start to use up helium and this causes them to grow a lot so that their temperature decreases, turning them red.
So, at this stage the stars are classified as giantsred.
And the sun?
The Sun uses 600 tons of hydrogen every second. According to astronomers, this indicates that the Sun's lifetime will end in about 5 billion years.
In your case, after reaching a gigantic dimension, it will transform into a nebulaplanetary. What's left of him will be a white dwarf.
What are White Dwarf Stars?
These are stars that have residual heat because they have already burned their helium gas. As they cool, they become more difficult to see with the naked eye. Before this stage, however, they have already passed through the red giant star stage.
brown dwarfs
Not all interstellar clouds form stars. When they don't reach a certain dimension they don't turn into stars, so they are called “brown dwarfs”.
It is noteworthy that it is incorrect to call them “dwarf stars” because they are not stars, they are just “brown dwarfs”.
What is Shooting Star?
Shooting Star is the popular name as the meteor. The shooting star results from the release of a solid particle that evaporates. The result is a luminous effect.
When we visualize a luminous trail in the sky at night, we may be facing the phenomenon of the shooting star.
Shooting stars are formed by fragments from interplanetary space that heat up when they reach the atmosphere.
Youalsohe canifto interestper:
- Sun: all about the Sun
- Celestial bodies
- Black Hole
- What is Universe?
- Milky Way
- Solar system
- galaxies
