The earth revolves around the sun, do you know it? The orbital period of it is a year. A year consists of 365 days.

Btw, it was 3 days ago since we exchanged a few words, i.e. even if you talk the truth, you spent only 3 nights to observe the night sky.

If you live in the northern hemisphere, you cannot count the stars from the southern hemisphere. If you live in the southern hemisphere, you cannot count the stars from the northern hemisphere.

Thus I assume you could count whole stars x 3/365 x 1/2 ≒ 1/120 x 1/2 = 1/240. But you say you counted about 217,000,000,000. If the density of this galaxy is uniformly, the number of stars of it should be about 217,000,000,000 x 240 = 52,080,000,000,000 ≒ 52 trillion. This result apparently contradicts your opinion, you said "count", not "calculate", thus you proved yourself to be wrong perfectly.

@Civilizer
Please go back to School !

If the galaxy which our solar system is belong to consists of approximately 200 billion stars, the night sky must be very dazzling. But it's not, you would say it's because of various curtains of cloud, smog, dust, or carbon dioxide gas, but how about a sight from a space station or space shuttle? Did any astronaut say "The space is full of light"? Your opinion doesn't consist of sufficient description.

And, can you explain why the galaxy isn't crushed under the pressure of the huge gravity of enormous numbers of star? You may say - thank to the balance between the sum of the gravity and the centrifugal force. Omitting the calculation, it seems to sound scientific, but the vertical direction to the spiraling galaxy must be unaffected by the centrifugal force. So it should be more thin than 7,000 light-years thick and becomes a ring like a donut due to unbalance of the two forces. I repeat the sun is not a star.

According your own definition of Star,Our Sun is 100% member of Stars.
English:
Star = self-luminous celestial body consisting of a mass of gas held together by its own gravity in which the energy generated by nuclear reactions in the interior is balanced by the outflow of energy to the surface, and the inward-directed gravitational forces are balanced by the outward-directed gas and radiation pressures.

Then Our Sun is 100% Star.
Now you know.!

According to the definition of Longman dictionary - star is a very large mass of burning gas in space, especially, one that can be seen as a small bright point of light in a clear sky at night. Obviously, the sun doesn't clarify whether it is a mass of gas or not. Have you ever verified it with your sense of touch and smell? I think no, so it is not clear whether the sun is a star. Needless to say, the sun isn't small like a star. In addition, the sun isn't seen at night except particular place like a space station on the orbit around the earth. In general, a night disappears spontaneously at sunrise on the earth, so the definition of star can't apply to the sun, it means the sun isn't a star. Besides, about stars including your example, Sirius, I have not heard they have phenomenon of a solar eclipse like the sun, what about you?

@civilazer
According to you,Sun is not a Star?......lol
Well,what is the definition of Star?
For example Sirius is Star that behave just like our Sun,but it. Visible color is ebluiscent bright white not bright yellow as our sun.
Mr Civilazer,are you a teacher or a student?

You showed the controversial theory, it's maybe from NASA official perspective, but I don't think so. I offered another way to find the truth. Sun is not a star, in common sense, star is shining but small, where is resemblance between them? Do you think an ant and an elephant are same creatures? They surely fall into the category of animal, but not same animal.

The earth I touched, it's a planet. You and I never touched the star.

Thanks for the link. You have some interesting, informative videos. Keep up the good work.

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