| Category | Format | Size |
|---|---|---|
| E-education edition sixth grade science volume 2 | pptx | 6 MB |
"There is a "river" in the sky" PPT courseware 2
Description
"There is a "river" in the sky" PPT courseware 2
Watch animations and think about questions
In mythology, what did the Queen Mother use to separate the Cowherd and the Weaver Girl?
What does the Milky Way look like? What do you think it is made of?
The Milky Way has many interesting nicknames in Chinese classical poetry, such as:
The "Star Han" in Cao Cao's "Guan Cang Hai" "The stars are as brilliant as if they came out of them".
The "Yunhan" in Li Bai's "Drinking Alone under the Moon" "We will travel together without mercy forever, and meet each other in Yunhan".
The "Galaxy" in Du Fu's "Evening in the Pavilion" "The sound of drums and horns at the fifth watch is solemn and solemn, and the shadows of the stars in the Three Gorges are shaken".
The "Long River" in Li Shangyin's "Chang'e" "The candle shadow on the mica screen is deep, the long river is gradually falling and the dawn stars are sinking".
Milky Way and Milky Way
Strictly speaking, there is a difference between the Milky Way and the Milky Way.
The Milky Way is not the Milky Way, but the bright band that can be seen on the earth when part of the Milky Way is projected in the sky.
Read the information and find the answers
Read the short information on page 48 and find out what celestial bodies the Milky Way is made of?
What is the shape and size of the Milky Way?
1. What is the Milky Way made of?
1. Contains about 100 billion stars
2. Composition: star system, gas, dust material
The sun is just one of the stars; the solar system is just one of the galaxies.
View from the front: wheel-shaped vortex
Four spiral arms
Swan arm, Perseus arm, Orion arm, Centaur arm
Tips: I’ll give you a measuring stick
Light year: In astronomy, the distance traveled by light in one year is defined as one light year.
Please do the math: How many kilometers is a light-year away? (The speed of light is 300,000 kilometers/second)
1 light year
=3×105 kilometers/second×3600 seconds/hour×24 hours/day×365 days
=9.46×1012 kilometers
9460000000000 kilometers
Examples of lightyear applications
The closest known star to the solar system is Proxima Centauri, which is 4.22 light-years away.
The Andromeda Galaxy is the closest large galaxy to our Milky Way, located 2.2 million light-years away.
At present, the scope of astronomical observation has expanded to a vast space of 20 billion light-years.
Keywords: There is a River in the Sky teaching courseware, download the science PPT courseware for the second volume of the sixth grade of the E-education edition, download the science slide courseware for the sixth grade, download the PPT courseware of There is a River in the Sky, .PPT format;
For more information about "There is a River in the Sky" PPT courseware, please click on the "There is a River in the Sky" PPT tab.
"There is a "river" in the sky" PPT courseware:
"There is a River in the Sky" PPT courseware There is a River in the Sky Thinking and discussion: Do you know what the huge celestial system of the Milky Way is made of? Please tell me. The composition of the Milky Way Galaxy. Stars: 200 billion (including 100 billion stars). A large amount of gas and dust...
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Update Time: 2024-07-09
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