In addition to the sun, there are no large fireballs that emit light and heat?

At the beginning of the 20th century, the Harvard University Observatory in the United States has conducted a spectroscopic study of 500,000 stars. The stellar spectrum is classified according to the occurrence of spectral lines in them. It turns out that they are also related to color, i.e., the main types such as the "O" type of blue, the "B" type of blue-white, the "A" type of white, the "F" type of yellow-white, the "G" type of yellow, the "K" type of orange, and the "M" type of red.

In fact, this is a series of stellar surface temperatures, from O-type in the tens of thousands of degrees to M-type in 2-3 thousand degrees. The Danish astronomer Herzpron and the American astronomer Russell built the famous "spectroscopy-photometric diagram", also known as the "Her-Roe" diagram, according to the relationship between the spectral type and the luminosity of the star. Most of the stars are distributed on the diagonal from the top left to the bottom right of the map, called the main sequence, and they are all dwarf stars.

There are other types of supergiants, bright giants, giants, subgiants, subdwarfs, and white dwarfs, and these different types indicate that they have different luminosities. Her-Rotu is one of the most important means of studying stars. It not only shows the characteristics of various types of stars, but also reflects the evolution of stars.

In the spectral classification of stars, types O, B, and A are called "early stars"; F and G types are called "intermediate spectral types"; The K and M types are called "late stars". In the late 90s of the 20th century, astronomers went beyond the m-type to extend the spectral classification of stars to the case of lower temperatures, first proposing a new L-type, and then proposing a lighter spectral classification T-type than the L-type.

Yes, I was very detailed.

I'm just correcting that the sun isn't a big fireball, there's almost no oxygen in the universe, so it's not really burning, it's a nuclear reactor that's going on with a violent nuclear reaction.

Absolutely! All the stars in the sky that you can see, except for one planet, are "big fireballs that shine and heat" like the sun.

Of course, many celestial bodies in the universe are large glowing fireballs.

Stars emit light and heat, and there are countless stars in the vast universe.

The rhetorical device of analogy is adopted.

Here we grasp the common point between the sun and the fireball "heat" to make an analogy, the body is the sun, the metaphor is the fireball, the sun is compared to the fireball, so that the characteristics of the sun become a common substance in life, let people simply feel his state.

The sun heats up and glows because of thermonuclear reactions inside the sun.

About three-quarters of the Sun's mass is hydrogen, and the rest is almost all helium, including less than 2% of oxygen, carbon, neon, iron, and other heavy elements. Under the conditions of high temperature and high pressure in the interior of the sun, hydrogen atoms undergo a "thermonuclear reaction", which is composed of four hydrogen nuclei into one helium nucleus. In this reaction, a portion of the mass is converted into energy, releasing a large amount of heat.

The Sun is a star located at the center of the solar system, an ideal sphere intertwined with hot plasma and magnetic fields. The Sun is composed of a core, a radiation zone, a troposphere, a photosphere, a chromosphere, and a corona. Below the photosphere is called the interior of the Sun; Above the photosphere is called the solar atmosphere.

The sun will shine and it will heat up.

It's a big ball of fire" uses an analogy to illustrate it.

Analogy refers to the elevation of the characteristics of things through the rhetorical method of metaphor, using the similarities between two different things for comparison.

The analogy is an expository essay.

A common way to explain this:

1. The first key to analogy is to grasp the core of the problem.

2. The second key to the analogy is that we must use simple things to compare complex problems, rather than using complex things to compare simple problems.

The sun will shine and it will heat up.

It's a big fireball, and it's a metaphor to illustrate the method.

The method of using the similarities between two different things to compare them to highlight the shape characteristics of the things and enhance the vividness and vividness of the explanation is called analogy.

Expository text. The method of illustration of the analogy is the same as the figure of speech.

The metaphor and association are consistent. The difference is that figurative rhetoric has similes, metaphors, and borrowings, while illustrations use similes and metaphors, while borrowings are not appropriate.

The sun will shine, it will heat up, it is a big fireball", the "sun" is compared to "laughing at the big fireball", which is an analogy method.

The sun glows, it heats up, it's a big fireball, and it's an analogy to illustrate the method.

I used an analogy to illustrate it.

Here we grasp the common point of the sun and the fireball "heat" to make a metaphor, the body is the sun, the metaphor is the fireball, the sun is compared to the fireball, so that the characteristics of the sun become a common substance in life, let people simply feel his state.

Analogies are a good way to explain a problem to others, especially laymen.

Comparing an object to a thing vividly illustrates what kind of characteristics and vividly expresses the author's thoughts and feelings.

I used an analogy to illustrate it.

It is used for example, seven o'clock red bar to will chestnut cake off.

The illustrative method used in this sentence is an analogy.

The parable,,, compares the sun to a fireball.

An analogy is used.