천체운동 가상실험 - 내행성,외행성,별의일주운동, 달의

The overall experiment of astronomical motion can be finished with this virtual experiment - Inner, Outer, Star's movement of the star, Moon phase change etc.

This program can explain the entire contents of astronomical exercises that students are having difficulty with.

Every little bit of time you use this program to explain

Later on, the students become familiar enough to say "Oh and I do it" even when I just walk on the screen.

* When we teach classes related to the original body, the sun turns, the earth turns, the moon turns, and the students turn their heads. By using this program, one at a time, one at a time, at any moment, students begin to naturally accept the rotation of the earth. It is good because it can be repeated with the same principle every hour instead of one time. It is one of my favorite programs developed so far. I do not need words. Run the program and follow the instructional tips described below. Then you can see that it is different from reading with eyes

Upgrading to 2.0 has simplified the way of manipulation so that all planets can be dragged, and the ability to directly observe the moon's phase has been added.

Large screens can be manipulated, and small screens can be expressed in the center of the viewer.

In fact, every hour in class, we begin by rotating the earth from west to west. As you add one or two in a day, you can begin to understand the movements of the celestial body at any moment. The important thing is that you have to review it quickly and repeatedly from the time you learned before, no matter what class you are in.

* All the stars, planets, and satellites in the solar system rotate from east to west (counterclockwise when viewed from the north pole) (with a few exceptions)

1. Getting to know the time: only with the earth and the sun (first time - the easiest and most important)

 - Selecting the sun and spinning each other in the same time to learn the time, emphasizing that the sun does not move and rotating the earth from the west to the east

 - Rotate the earth from west to east and set the current time. If the sun is above your head, it will be 12 o'clock, 6 o'clock if you rise from the east, 6 o'clock in the west. At first, only the activity to learn the time and see the sun is repeatedly studied. If you do not get used to it here, it is meaningless from the next explanation. This can be seen as a kindergarten.

2. Circle of the Stars movement: the earth has only the sun stars Description

  - Show the stars, drag the object to the right, and rotate them in the same way. On Earth, all bodies are drawn from the East and lie together. But in reality the object does not move. It is a phenomenon that occurs because the Earth rotates. therefore

  - Explaining that the star rotates from the east and travels west as the earth rotates from west to east

3. Why the Moon is rising late by 50 minutes: Earth - Sun - Moon

 - Let the moon appear.

 If we assume that the moon does not revolve around the earth and rotate the earth from west to east, the moon will rise at the same time every day. The Moon moves a little bit in the direction of the Earth's rotation while the earth rotates one turn (actually, the Earth moves a little in the direction of the Earth's rotation, rotating the Earth one turn, so the Moon starts early yesterday? From the sun to the east, and confirms the time based on the sun)

 - Earth rotation, Earth rotation, and Moon rotation all rotate in the same direction (counterclockwise). Since the moon circles around the earth every month, it moves from west to east by about 13 degrees every day.

Then the time of the rising of the moon will be a little slower than the previous day. In other words, the moon is late for 50 minutes a day.

4. Moon Phase Change: Earth-Sun-Moon

 - You can see how the shape of the moon changes according to the position of the sun, the earth, and the moon. If you rotate the moon slightly while revolving the earth, you can see that the moon's phase changes from the crescent moon.

 It is also important to note that the time is based on the sun, for example, when the moon is over the head, If the sun is on the horizon of the east, it will be 6 o'clock in the morning. Now let's rotate the earth from the west to the east, and the uppermost moon on the head will be on the west side. You can see that it is 12 o'clock. It seems difficult, but if you repeat it a few times, you can know when the full moon or the moon is rising.

5. Observation time: Earth - Sun - Venus

  - Inner (Venus) turns around the sun. Therefore, since it exists only in the vicinity of the sun, if you rotate the earth, you can see it for a moment before the sun comes up, (Hold the Venus and rotate it around the sun, and you can see where Venus is up or down if you think about the current time,

6. Observation time: Earth - Sun - Outer (star)

  - The outward star (star) is going out of the earth orbit from the sun, so it can not be seen only at dawn or early evening like an underground, but it can be seen at midnight. (If you rotate the earth from the west to the east, you can see that the time for observing the outer circle is not fixed, unlike the inner circle.)

7. Playing the Sun: Earth - Sun - Stars

 - Let the sun and the stars match the east horizon and think about rotating the earth. If the sun and the stars do not move, the sun and the stars must always be floating at the same time. However, in fact, the earth rotates around the sun at an angle of 1 degree per day. So when the stars match on the eastern horizon one day later, the sun will be about 1 degree below the eastern horizon.

In fact, while the Earth rotates one turn, the Earth must revolve around the left sun, from west to east, at 1 degree per day. However, since this program can not revolve the earth, if you think about it relatively, you can lower the sun below 1 degree. (If you do not understand, run the program yourself and think about rotating the earth unconditionally)

 In other words, when you fix the celestial constellation (constellation), the sun moves between the constellations in the east (counterclockwise), one degree per day.

8. Stellar performance

Think of the sun and stars on the east horizon and observing them at the same time each day. In order to be at the same time each day, the sun must always be matched to the east horizon. Then, relatively, the star should float on the eastern horizon at least one degree. Therefore, when you look at the standard of the sun, you can see that the stars move one at a time per day.

In other words, if you observe the stars at the same time every night, the stars will travel 1 degree apart from each other in the sky. That is why the constellation of the season changes.

9. In addition, it can be applied to all the problems related to the celestial body, such as the time of the rising star, the time of the moon rising or falling, and so on.

Source: https://sciencelove.com/1106 [Kim Jong-sik]