Do a little bit of liberal arts astronomy. Help answer a little bit about astronomy in the liberal a

1.A black hole is a relativistic version: a point with zero volume and infinite density; The quantum version has a minimum volume limit, the surface is not perfectly round, and there is a certain probability of quantum bubbles.

2.Black holes emit rays (which are electromagnetic waves).

3.Celestial equator - the plane of the Earth's rotation; Meridian Circle - The meridian circle is the great circle on the celestial sphere that passes through the north celestial pole, the zenith, the south point, the south celestial pole, the nadir and the north point, and intersects with the celestial sphere; Horizon circle - the great circle of the celestial sphere that crosses the center of the celestial sphere and is perpendicular to the plumb line; Ecliptic – the orbital plane of the Earth.

4.Coplanarity, isotropy, near-circularity.

5.Because these two tracks do not coincide.

6.The star's self – the angle at which the star stretches to the observer along the distance traveled perpendicular to the line of sight in a year; Doppler effect – the stretching and compression of waves by a moving object; The star itself is the annual angular displacement on the celestial sphere caused by the movement of the star relative to the Sun. That is, the angle of the star's spatial motion v to the observer in one year perpendicular to the line of sight, and the velocity component of the star in the perpendicular direction to the Sun can be calculated from the distance from us and the measured angular velocity.

The velocity component in the direction of the line with the sun can be calculated according to the redshift, and the above two velocity components form the right-angled side of the triangle, and the hypotenuse of the triangle is its velocity.

7.Hertzsprung-Russel Diagram (abbreviated as H-R Diagram) was independently proposed by the Danish astronomer Hertzprung and the American astronomer Russell in 1911 and 1913 respectively. Later studies found that this map was an important tool for studying the evolution of stars, so such a map was named after two astronomers of the time, and it was called the Herault chart.

The vertical axis of the Herault diagram is the luminosity and absolute magnitude, and the horizontal axis is the spectral type and the surface temperature of the star, decreasing from left to right.

8.The Milky Way is a spiral galaxy of stars, planets, gas and dust.

9.Light elements fuse into heavier elements (pre-iron).

10.Neutrino - Neutrino, also translated as microneutrino, is a type of lepton, is one of the most basic particles in nature, and is often represented by symbols. Neutrinos are uncharged, have a spin of 1 2, have a very light mass (less than one millionth of an electron), and move at close to the speed of light.

11.From a high-temperature and high-density space that expands dramatically in a short period of time to form the early universe, there are two possibilities in the future: first, it will expand forever, and second, it will collapse after a certain critical value, and then circulate like this.

Depends on the relationship between dark matter (dark energy) and gravity.

Take a look at the astronomy forum, there are so many questions, written tired o( o

1. If a blueshift is observed, it means that it is approaching.

2 Supernova.

The center of the star begins to cool, it does not have enough heat to balance the central gravity, and the structural imbalance causes the entire star to collapse towards the center, causing the outer cool and the red layer to become hot, if the star is large enough, these layers will undergo violent **, producing a supernova.

3. Matter falling into a black hole emits radiation Observe the radiation.

4. First it becomes a red giant, then it becomes a white dwarf.

5 Nuclear fusion.

6 will become.

7. It seems that it will not form anything other than what you said.

1) According to the spectral color of the luminous light of distant stars, close to red is far away, close to violet is close, 2) do not know.

3) Method 1: Compare distant stars as a background, and compare them every day to find dark matter.

Method 2: When the black hole is close to the galaxy, it is directly observed that the engulfing of the galaxy causes the galaxy to distort and deform.

4) I don't know. 5) I guess it's fusion.

4 white dwarfs. 5. Nuclear fusion and nuclear fission.

That's all I know.

With the formation of cosmic garbage. Because there are substances that are absorbed. Sunspots become larger and are red giants. through fission.

1.A black hole is a star, and the gravitational pull is too great for light to be separated, so that the outside world cannot see the light from this star, which is black.

2.Black holes are not black seems to be Hawking's conclusion through calculations. It is said that if the black hole does not radiate outward, it violates the second law of thermodynamics, that is, the content about entropy (it is true, after the black hole swallows an object with entropy, the external entropy decreases, which violates the law, and you can see a brief history of time).

3.Celestial equator: If the sky is seen as a large ball, then the North Star is the North Pole, around which all the stars revolve.

Among them, the trajectory of the star with the longest trajectory is the celestial equator. (In fact, it is conceivable that the celestial sphere is a big ball like the earth, covered by the earth, the north star is the north pole, and the equator can be imagined) The ecliptic is the orbit of the earth around the sun. The meridian circle is the prime meridian, which is the circle composed of longitude 0 and 180, you can find a globe to look at.

4.How do you say this? In particular, there is Venus, which rotates from east to west, and everything else is from west to east.

5.Because the Moon's orbit varies from month to month, it revolves around the Earth in general. And even if it happens, it's not visible everywhere.

6.The Doppler effect is the phenomenon that the tone of the car changes from high to low when the car presses the horn to pass by, and the specific explanation can be checked, which is a bit complicated.

7.I don't know.

9.Nuclear fusion.

10.A particle with a very small mass, it is recommended to go to the encyclopedia to check it.

11 The universe may stop expanding or continue to expand in the future.

You can write a ** for almost every item of your question.

Let me add.

2.It shows that light is not only wave-like, but also particle-like. (wave-particle duality).

5.A solar eclipse occurs when (1) the Sun and the Moon are in the same plane as the Earth and (2) it happens to be the New Moon. Not necessarily every New Year's Moon is satisfied (1). (There is an angle between the apparent orbit of the sun and the apparent orbit of the moon).

6.The lateral motion of a star relative to us is called self, and the velocity of space can be calculated using the parallelogram rule (vector calculation) according to the self (lateral motion) redshift (longitudinal motion).

7.The Herault diagram is a graph that describes the temperature of a star and its brightness, representing the relationship between the temperature and brightness of the star, with the x-axis being the temperature and the y-axis being the brightness.

11.The universe is a singularity at the beginning (volume is 0), and then it happens that the temperature of the universe rises, accelerating expansion, and when the temperature drops, the expansion rate of the universe slows down, and finally stops expanding, and the temperature continues to fall, and the universe will contract.

Figure 1 is the inner planets, and Figure 2 is the outer planets are conjunctions, 1 and 5 are the upper conjunctions, 4 and 7 are the lower conjunctions, 4 are transits, and 7 are oppositions. 2 is the great distance of the west, 3 is the great distance of the east, 6 is the west and 8 is the east.

The best time to observe the planets in the interior is at a large east-west distance, because they are far from the sun, so they are less affected by the sun's rays. The best time to observe exoplanets is at opposition, when they are at their brightest.

It takes half a day to see the sun rise at the North Pole.

If you're looking for a book, how can you just write the details? That's a lot!

You can check out Stephen Hawking's "The Universe in a Shell" and "A Brief History of Time".

In the process of the moon orbiting the earth, it also follows the earth around the sun. This means that after a week of the Moon's orbit around the Earth, it will return to its position in space. It can be seen that the Moon also participates in the movement of multiple systems in the process of motion.

The motion of the Moon, like other celestial bodies, is in eternal motion. In addition to rising in the east and setting in the west, the Moon also moves from west to east on average by more than 13° per day relative to the star, so the Moon rises about 50 minutes later every day than the day before. The rising and setting of the moon in the east and setting in the west is a reflection of the rotation of the earth; The west-to-east movement is the result of the moon's orbit around the earth.

The moon's orbit around the Earth is called a "sidereal month" and has an average of 27 days, 7 hours, 43 minutes and 11 seconds. As the moon revolves around the earth, it rotates itself. The rotation period and revolution period of the moon are equal, i.e., 1:

1. The time it takes for the Moon to orbit the Earth is the period of its rotation.

The result of the strange rotation of the moon is that the moon always faces the same half of the earth, and the far side of the moon can never be seen from the earth, and only by probes can the mystery of the moon be uncovered, and this wish of mankind has been realized more than 30 years ago.

The moon emits light by reflecting sunlight, and as the moon moves, the phase change of the reflective part of the moon occurs, which is called the moon phase. On the first day of the lunar calendar, when the moon orbits between the earth and the sun, we cannot see the light reflected by the moon, and we cannot see the moon, which is called the new moon, or new moon. The convex westward half moon after the seventh lunar month is called the first quarter moon.

It's the tenth day of the lunar calendar.

Five, ten. 6. On the 17th and 17th, the side of the moon facing the earth is completely illuminated, and a full moon is called a full moon, or a look. After the full moon, the bright side of the moon gradually becomes smaller, and it reaches the twentieth lunar calendar.

2. 23, the convex east-facing half moon phase is called the last quarter moon, when the moon rises in the east in the middle of the night, and a week later, the moon phase begins a new round of reincarnation from the new moon.

The moon appears in the west on the first day of the lunar calendar, and it does not take long for it to reach the horizon.

After that, it appears about 50 minutes later than the previous day.

So we can see that the moon is cloudy and sunny.

Dongsheng's. Because the moon revolves around the earth from west to east.

In my opinion, the essence of the so-called astronomy class belonging to the humanities is probably the ...... of "ancient astronomy".

In other words, it will teach you how to recognize the constellations and planets, and maybe add a little bit about the basic structure of the solar system and the Milky Way.

If so, then it is not unjust to be classified as a liberal arts.

But the astronomy major at university is undoubtedly science. The Department of Astronomy is located in the Faculty of Physics.

Similarly, when we were in high school, the second and third years of geography focused on human geography and economic geography, as well as environmental and urban planning. Actually, there's a little more of a textual thing.

However, when it comes to university majors, these contents are often divided into several key directions, and different directions are often thrown ...... different departments