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"In the Starry Sky (1)" Universe PPT Download
Part One: Constellations
The vast starry sky often makes people sigh and wonder how to recognize the stars. In order to facilitate identification, people group the stars that appear to remain at the same distance from each other into groups and divide them into different areas. These areas in the sky are called constellations.
In 1928, the International Astronomical Union decided to divide the entire sky into 88 constellations. The names of constellations are shapes composed of bright stars, combined with mythological stories, and named after characters, animals and appliances.
PPT in the starry sky, part 2: Build a “constellation” model
1. Find a square piece of cardboard with a side length of about 50 cm, and punch 7 small holes according to the picture.
2. Hang 15 cm, 12 cm, 15 cm, 17 cm, 27 cm, 27 cm, 14 cm long thin wires on the holes No. 1 to 7 respectively, and hang plasticine of the same size on the lower end of the thin wires. small ball.
3. Use the light of the projector to illuminate them from different sides and record the shadow of the plasticine balls on the screen.
What did you see from the different shadow images of the plasticine ball? What did you learn from them?
If you imagine these shadows as constellations in the sky, what new understanding will you gain about the constellations?
The stars that make up the Big Dipper are either far or near from us.
The shape of the Big Dipper is what we see from the perspective of the earth. If we look at it from different angles in the universe, their shapes will be different.
In the process of rotating the model, we see different shapes of the seven stars, just like the different scenes we see when we sit in a spaceship and orbit these seven stars.
The stars in the sky are also far or near from us.
PPT in the starry sky, part three: understanding the constellations
In vast areas of our country, the Big Dipper and Polaris are visible all year round. The Big Dipper is part of the Ursa Major constellation. It consists of seven stars forming a spoon shape. From the constellation graphic, the Big Dipper is located on the back and tail of the Big Bear.
We can easily find the North Star through the Big Dipper.
After observing the sky for a long time at night, the ancient Chinese discovered the pattern between the movement direction of the constellations and the changes in the climate on the earth. In the ancient Chinese book "Guanzi", there is a record of judging the current season by observing the position of the Big Dipper: "The handle of the Dipper points to the east, and the world is spring; the handle of the Dipper points to the south, and the world is summer; the handle of the Dipper points to the west, and the world is spring It is autumn, the handle of the bucket points north, and it is winter all over the world." This method of determining the four seasons by observing the regular changes in celestial phenomena is called "observation of phenomena and timing".
Regardless of the season, Polaris always appears in the sky due north of the Earth, so it has become a guiding light for night walkers.
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"In the Starry Sky (2)" Universe PPT teaching courseware:
"In the Starry Sky (2)" Universe PPT teaching courseware Part One: Review of the previous section 1. Which constellation do Polaris and the Big Dipper belong to? 2. How to find the North Star through the Big Dipper? 3. What is a horoscope? 4. Where do the constellations come from? ... ... .....
"In the Starry Sky (2)" Universe PPT download:
"In the Starry Sky (2)" Universe PPT Download Part One: Introduction of New Lessons Through the previous few studies, we have a certain understanding of the moon phases and constellations. Take out the moon phase charts and constellation charts that we have recorded, and have a starry sky exchange meeting together. ... ..
"In the Starry Sky (2)" Universe PPT:
"In the Starry Sky (2)" Universe PPT Part 1: Hold a communication meeting What moon phases have we observed? Did we observe Polaris and Ursa Major? What other zodiac signs do we know? Take out the moon phase chart and constellation chart we recorded, everyone...