What is a star, each of us knows from his childhood.This is a celestial body that we see as a small point of light in the night sky.In fact, all the stars - it's huge balls, consisting of hot gases.They contain ninety percent hydrogen, a little less than ten percent of helium, and the rest of the - various impurities.At the center of the sphere temperature is approximately six million degrees.This value corresponds to the limit, which allows the free flow of thermonuclear reaction.During this chemical process converts hydrogen into helium.As a result, allocated huge amount of heat energy that is transmitted into space in the form of bright light.
What is a star?This is the same as that of the sun.This small stars are smaller than our star is ten times as big it exceeds the parameters of a hundred and fifty times.
often in response to a question about what the star, astronomers call these fireballs main bodies located in the universe.The fact is that in them lies the bulk of luminous matter, which can be found in outer space.
stars in the sky that we can see through a telescope, often surrounded by nebulas that have a different shape.These tumors, which are clouds of gas and dust, can at any time begin the process of sealing.However, they will shrink in the shape of a sphere, and will warm up the temperature significantly.When the thermal regime will reach six million degrees, begin thermonuclear interaction, that is, it formed a new heavenly body.
Scientists have identified different types of stars.They are classified by their weight and glow.Perhaps the division and the stages of the evolutionary process.
class that contains stars whose radiated energy is balanced with the energy of thermonuclear reactions, classifies them by type of glow on:
- white;
- blue;
- blue-white;
- yellow;
- white and yellow;
- red;
- orange.
maximum temperature observed in stars with a blue glow, the minimum - in red.Our sun is a yellow kind of stars.Its age is more than four and a half billion years.The temperature of the core, which scientists have calculated is 13.5 million K, and the crown - 1.5 million K.
What is giant star?This type of fire luminaries include body mass and have diameters exceeding the Sun a few tens of thousands of times.Giants, emits a red glow, is at a certain stage of evolution.The diameter of the star increases the time when its core is completely burn hydrogen.This reduces the temperature of the combustion gases and millions of kilometers covered by a red glow.By giants include VV Cephei A, VY Canis Majoris, KW Sagittarius and many others.
there among the heavenly bodies, and dwarfs.Their diameter is much smaller than our sun.There dwarfs:
- White (cooling down);
- yellow (similar to the Sun);
- brown (often regarded as the planet);
- red (relatively cold);
- black (completely cooled and lifeless).
There is also a type of variable stars.These lights are a body that at least once in the history of observation changed their brilliance and dynamics.These include:
- spinning;
- pulsating;
- eruptive;
- other unstable, new, and difficult to predict sun.
These stars, which are represented mainly by bright blue and hypernovae, are very specific and have been little studied.Each of them is a result of the resistance of matter and the forces of gravity work.
K stars are also black holes.It is believed that this is one of the stages of evolution of celestial bodies.The glow of such a body does not radiate, but some of its characteristics put it on a par with the stars.
