younger man interested in everything.He asks questions about everything he sees.Why is the grass green?Why the sun shines during the day and the stars at night?And so on and so forth.Respond to the seemingly simple questions is not always easy.Because sometimes lack any special knowledge.And how to explain the complex in a simple way?Not everyone is under force.
What is a star?
Without this concept can not be understood to explain why the sun shines by day and the stars at night.Often kids star is small dots in the sky, which they compare with small lamps or flashlights.If we draw an analogy, it can be compared with huge spotlights.Because the stars - is unimaginably huge fireballs that are incredibly red-hot and are at such a distance from us that seem crumbs.
What is the sun?
First you need to tell the Sun - the name, like the name.And this name is the closest star to our planet.But why is it not the point?And because of that the sun shines during the day and the stars at night, if they are the same?
sun does not seem to point because it is much closer than the others.Although to him too far.If you measure the distance in kilometers, the number will be equal to 150 million.This way the car will travel 200 years, if it is non-stop to move at a constant speed of 80 km / h.Because the sun is incredibly long distance seems small, even though it is, that easily could accommodate a million planets like Earth.
By the way, the sun is not very big and not very bright star in our sky.It is just in one place on our planet, and the rest are scattered far away in space.Why
day seen the sun?
First you need to remember that when the day begins?The answer is simple: when the sun begins to shine over the horizon.Without him, the world is impossible.Therefore, answering the question of why the sun shines during the day, we can say that he will not come a day when the sun comes up.After all, as soon as it goes beyond the horizon, the evening comes, and after - night.Incidentally, it is worth mentioning that the move did not shine, and the planet.And the change of day to night is due to the fact that the Earth revolves around without stopping its fixed axis.
Why did not see the stars during the day when they, like the sun is always shining?This is explained by the presence of our planet's atmosphere.In the air, the sun's rays are scattered and weak overshadow Glow Stars.After his call dissipation stops, and nothing is blocking their dim light.
Why the moon is visible at night?
So the sun shines during the day and the stars at night.The reasons for this layer of air surrounding the earth.And that is why the moon is visible, is it not?And when it is, it may take different views - from a thin crescent to a bright circle.What does it depend?
turns out that the moon itself does not glow.It works like a mirror that reflects the sun's rays on the earth.And observers see only the portion of the satellite, which is illuminated.If we consider the whole cycle, it starts with a very thin month, which resembles an inverted "C" or arc of the letter "P".During the week, it grows and becomes like a half circle.For the next week he continues to grow with each passing day is getting closer to a full circle.The next two weeks drawing is reduced.And at the end of the month the moon completely disappears from the night sky.More precisely, it just is not visible because it is illuminated by only the part that is turned away from Earth.
And what people see in the cosmos?
Cosmonaut in orbit does not take up the question of why the sun shines by day and the stars at night.This is due to the fact that there is seen simultaneously both.This fact is explained by the lack of air that prevents the light from the stars to pass through the scattered rays of the sun.You can call them lucky because they can immediately see the up and coming stars, and those that are far away.
way, the night light vary in color.And it is clearly visible even from Earth.The main thing - to look closely.The hottest of them are shining white and blue.Those stars that are cooler than the previous ones, yellow.Among them is our sun.And the coldest emit red light.
Continued talk about the stars
If the question of why the sun shines by day and the stars at night, occurs in older children, you can continue the conversation, thinking about the constellations.They joined a group of stars that are in the same position on the celestial sphere.That is, they seem to us adjacent.In fact, between them can be a huge distance.If we could fly off away from the solar system, it would not know the starry sky.Because the outlines of the constellations have changed dramatically.
In these groups of stars the ancient people saw the outlines of human figures, animals and objects.In connection with this, there were various names.Big and Little Dipper, Orion, Swan, the Southern Cross and many others.Today, there are 88 constellations.With many of them are related myths and legends.
Because of the Earth's rotation around the sun constellations change their position in the sky.And some even visible only in certain seasons.There are constellations that can not be seen in the Northern or Southern Hemisphere.
Over time lost minor stars of the constellation, and their figure was difficult to guess how the name originated.The best-known constellation of the northern hemisphere - the Big Dipper - now turned into a "scoop."And modern children tormented by the question: "Where is the bear?ยป
