How many comets are there in the universe? How many comets are there in the solar system

Yes, but that's not all the quantities in the universe, it's the quantities that have been observed so far!

Here's what the stars criticized me:

Upstairs is also wrong, the number of meteors observable (and the concept?). But it has to do with the aperture of the telescope, so I don't think it's appropriate to say that. However, at the moment, not a single comet can be seen with the naked eye.

Author: Zenith Star - General Soldier Level 11 9-16 13:49You must know that we are not observing meteors, and that is, the number of observations I am talking about at present refers to all the telescopes that have been seen and recorded (too small to be recorded), and not really any number, because even in the Milky Way we still have a lot of observations, let alone in the universe, and you mentioned the size of the telescope, "all the current observations" include the telescopes with the largest aperture at present, including satellites, Later it may be possible to make better ones, and observe more, but what I say is that "at the moment" there is a narrative in A Brief History of Time.

Surely not, a small object made of water ice, ammonia, carbon dioxide, etc., can be called a comet. There are countless such celestial bodies in the universe.

In astronomy, teachers often make mistakes, I have heard a teacher say that all the celestial bodies on the equator rise due east, sweat profusely... Not only that, there are low-level errors in the textbooks, and the geography textbook in Shanghai actually says that the Sunday movement of celestial bodies is the ** of meteor showers (the error is really too low-level). Therefore, for the remarks of teachers and textbooks, we must maintain the spirit of **, and we must not believe in blind obedience.

Upstairs is also wrong, the number of meteors observable (and the concept?). But it has to do with the aperture of the telescope, so I don't think it's appropriate to say that. However, at the moment, not a single comet can be seen with the naked eye.

In the solar system, more than 1,600 comets have been discovered by 2019, most of which orbit the sun in the same direction, but there are also reversal cycles. Comets exhibit peculiar shapes as they orbit the Sun.

There are also a large number of large and small meteoroids in the solar system, some of which are swarms of meteors, and these meteor swarms are the product of the disintegration of comets. Large meteoroids descend to the ground and rise to meteorites.

The solar system is a collection of celestial bodies centered on the Sun and subject to the Sun's gravitational constraints. It includes eight planets (in descending order from closest to the Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune), as well as at least 173 known moons, five identified dwarf planets and hundreds of millions of small bodies in the solar system, and Halley's Comet.

This number is immeasurable. Because the origin of comets is still an unsolved mystery. The number is also extremely large.

1. It has been proposed that there is a very large comet region in the outer solar system, where there are about 100 billion comets called Oort clouds.

2. Some people also believe that comets formed near Jupiter or other planets;

3. Some people believe that comets formed in remote regions of the solar system; Some even believe that comets are visitors from outside the solar system. It's not just that the total number of comets is difficult to determine, even the mass of individual comets is uncertain.

Comet refers to a celestial body that moves around the sun when it enters the solar system, and its brightness and shape change with the change of solar distance.

Comets are divided into three parts: the nucleus, the coma, and the tail. The comet nucleus is made up of icy material, which sublimates as the comet approaches the star, forming a hazy comet and a tail of thin material around the ice core.

The comet has a very small mass and density, and when it is far away from the sun, it is just a "dirty snowball" of frozen ice cubes such as water, ammonia, methane, etc., and many solid dust particles. When approaching the Sun, the comet is broken down into a head and tail by solar radiation, which resemble a broom.

The cause of the comet tailThe tail of the comet is thought to be made up of gas and dust, and the combined effect of 4 blows it out of the comet:

1. The initial momentum obtained when the gas and associated dust evaporate from the nucleus of the comet.

2. The radiant pressure of sunlight pushes dust away from the sun.

3. The solar wind blows charged particles away from the sun.

4. Gravitational attraction towards the sun.