There are a few stars in the sky and a few trees on the ground

The total number of stars that can be seen with the naked eye is only about 6,000, and the number of stars seen through telescopes is much larger. Does that mean they're countless? Stars are very dense in the Milky Way direction, but relatively few in other directions, which means that we have to abandon the overall concept of stars that form spherical structures.

If that were the case, there should be as many stars in each direction as there should be in the Milky Way direction, and, as the more recent stars twinkle against a faint light background (not as spectacular as it is now), the whole sky will be illuminated. We must assume, then, that the stars exist in large non-spherical clusters and extend farther in the galactic direction than in other directions. Since this is the case, the Milky Way shows that the stars are clustered into a lens shape or a hamburger shape.

This lens-shaped cluster is called the Milky Way (from the Greek definition of Milky Way), and the name Milky Way has been retained because of the dark band of light we see around the sky. The first person to propose that stars exist in occultation galaxies was occultation astronomer Thomas. Wright.

He made the proposal in 1750, but his ideas seemed so confusing and incomprehensible that few people paid attention to him at first. Of course, even if the Milky Way is lenticular, it can always extend in the long radial direction. Although only a relatively small number of stars are seen on the outside of the Milky Way, there are countless stars inside the Milky Way.

To illustrate, William. Herschel counted the number of stars. Naturally, it is impossible to count all the stars in a certain period of time.

Herschel selected 683 small areas, evenly distributed in the sky, and counted the stars seen with a telescope in each area. In this way, he obtained the number of stars in what we now call an "imaginary poll" in the sky. This is the first example of the application of statistics to astronomy.

Herschel believed that the number of stars in each region was related to how close it was to the Milky Way. In all directions, the number of stars increases steadily as the degree of approximation to the Milky Way increases. From the number of stars he counted, he could estimate the number of stars in the Milky Way and how big the Milky Way might be.

In 1785, he announced the results and proposed that the long diameter of the Milky Way was about 800 times the distance from the Sun to Sirius, and the short diameter was 150 times that distance. Half a century later, Sirius's actual distance was calculated, and it was concluded that Herschel believed that the Milky Way was 8,000 light-years long and 1,500 light-years short. At the same time, he calculated that there are 8 billion stars in the Milky Way.

This is a huge number, but it is not uncountable. In the last two centuries, astronomers have explored the Milky Way with far better instruments and techniques than Herschel could have used, and now know that the Milky Way is much larger than Herschel had imagined. Extending at least 100,000 light-years in the long radial direction, it may have 200 billion stars.

But it's fair to say that we have confirmed that the Milky Way and the stars are not infinite but calculable, and that's Herschel's work.

How many stars in the sky and how many trees on the earth' is possible?

In the past, the old man said that there are several stars in the sky, and there are several people on the ground, and if a star falls, one person will return to heaven. Do you believe it?

There are countless stars in the sky, but no more than 7,000 can be seen with the naked eye. And since people standing on Earth can only see half of the sky above their heads at most, we usually don't see many stars. The actual number of stars in the universe is indeed an astronomical number.

You just have to look at it with a telescope. The number of stars in a telescope is exponentially greater than what can be seen with the naked eye, and the larger the telescope used, the more stars can be seen.

The stars in the sky are bright and dark. As early as more than 2,000 years ago, astronomers lined up the stars according to their brightness, calling the brightest ones "1st magnitude stars", the lesser ones "2nd magnitude stars", and the 3rd magnitude stars "The faintest stars that can be seen by the naked eye are 6th magnitude stars."

In fact, in the entire sky, there are only 20 stars of the 1st magnitude, 46 stars of the 2nd magnitude, 134 stars of the 3rd magnitude, 458 stars of the 4th magnitude, 1476 stars of the 5th magnitude, and 4840 stars of the 6th magnitude. From the 1st to the 6th magnitude of the stars, the total is 6974.

Even plus. There are only 6,980 planets such as Mercury, Venus, Mars, Jupiter, and Saturn and the Sun.

For example, a small binoculars can see about 7 or 8 magnitude stars; 14th magnitude stars can be seen with a 120 (lens diameter of 120 mm) telescope manufactured by Nanjing Astronomical Instrument Factory; If you use the 5-meter telescope on Palomar Mountain in the United States, you can see 21 magnitude stars, which is about to be nearly 2 billion.

In fact, even if you use an astronomical telescope with a diameter of 5 meters to observe the stars, you can only see a drop in the ocean. The stars in the vast universe are actually innumerable.

The Milky Way, where our sun is located, is generally estimated to contain about 150 billion stars, and humans have observed dozens of such "galaxies" by current observation methods.

Everyone knows that what is "observed now" is far from the whole universe. Therefore, in this sense, the stars in the sky are indeed uncountable.

People always say that there are too many stars in the sky, but in fact, all the stars that can be seen with the naked eye can still be counted. Astronomers divide the stars in the sky into 88 constellations according to their regions. Among them, the northern sky (bounded by the celestial equator) has 29 constellations; There are 46 constellations in the southern sky and 13 constellations in the north and south of the celestial equator.

As long as we have patience and count the stars in one constellation, we can count the stars that can be seen with the naked eye. According to the calculations of astronomers: 6 stars of magnitude 0; 14 stars of 1st magnitude; 46 stars of 2nd magnitude; 134 stars of 3rd magnitude; 458 stars of 4th magnitude; 1476 stars of 5th magnitude; 4,840 ...... of 6th magnitudeNo more than 7,000 in total.

If we use a telescope, the situation is different, and even with a small astronomical telescope, more than 50,000 stars can be seen. The largest modern astronomical telescope can see more than 1 billion stars. In fact, the number of stars in the sky is much more than that.

The universe is endless, and what modern astronomers see is nothing more than a tiny, tiny part of the universe.

There are a lot of Zheng Haohong's years old!! Too many to count.

I can't imagine how many stars there will be.

We have so many fans of Zhang Xiaojie!! Hee-hee....Blinding....o( oHa!

There are a few Chinese cabbages on the ground, and a few stars in the sky.

In the clear night sky, the sky is full of stars and twinkles, densely packed, and there are almost too many to count. Are you really too many stars to count? Astronomers tell us that the stars in the sky that can be seen with the naked eye can be counted.

Astronomers divide the stars in the sky into 88 regions, that is, 88 constellations; According to the brightness of the stars, the stars are divided into grades, the brightest is the 1st magnitude star, the 2nd magnitude star is darker than the 1st magnitude star, and the 3rd magnitude star, the 4th magnitude star, the 5th magnitude star, the 6th magnitude star is the faintest star that can barely be seen by the naked eye. Astronomers tell us that after counting a constellation, counting another constellation, and counting the stars in each constellation according to their rank, we find that there are 20 stars of first magnitude, 46 stars of second magnitude, 134 stars of 3rd magnitude, 458 stars of 4th magnitude, 1476 stars of 5th magnitude, and 4840 stars of 6th magnitude.

In total, there are 6,974 stars visible to the naked eye in the sky. If we look at it with an ordinary astronomical telescope, we can find more than 50,000 stars, and the largest astronomical telescope in modern times, can see more than 1 billion stars. In fact, the number of stars in the sky is far more than that, and some planets are so far away from the Earth that even the largest astronomical telescopes cannot find them.

Some distant galaxies, in huge astronomical telescopes, are just vague specks of light, but they contain hundreds of millions of planets. The universe is endless, and modern astronomy can see only a small part of it. How many huge galaxies there are in the universe, and how many galaxies have not yet been discovered, are still a mystery that has not yet been solved.

1 year ago - Whistleblowing.

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