"There is a "river" in the sky" PPT courseware

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"There is a "river" in the sky" PPT courseware

There is a river in the sky

Thought and discussion: Do you know what the Milky Way, a huge celestial system, is made of? Please tell me.

composition of the galaxy

Milky Way

Stars: 200 billion (including 100 billion stars)

large amounts of gas

dusty matter

galaxy shape

*Front view: A huge wheel-shaped vortex system with four spiral arms extending outward from the core of the Milky Way.

*Viewed from the side: The main body of the Milky Way is like a large lens with a bulge in the middle. Most stars and interstellar matter in the Milky Way are densely packed near the central plane.

size of galaxy

*Diameter: 80,000 light years

1 light year - the distance light travels in one year.

300000 × 60×60 ×24 ×365=

*Thickness: 6000 light years.

*Mass: 140 billion times the mass of the sun.

*Age: 10 billion years.

*Sport: A giant spinning "frisbee" that also resembles a discus

*Position of the Sun: 28,000 light-years away from the center of the Milky Way. The entire solar system rotates around the Milky Way at a speed of 250 kilometers/second, and it takes 250 million years to complete one revolution.

How to make a schematic diagram of the Milky Way simulation:

Materials: pen, cardboard, sand, rag

Method: Use a water pen to draw a schematic diagram of the Milky Way on the cardboard, use sand to spread the rough shape along the pen line, and then use a rag to adjust.

extragalactic galaxy

*Is the Milky Way the entire universe?

*Other galaxies Twins

*Extragalactic galaxies: Outside the Milky Way, many huge celestial systems are also composed of tens of billions of stars.

*The furthest 10 billion light years from us

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 tag.

"There is a "river" in the sky" PPT courseware 2:

"There is a River in the Sky" PPT Courseware 2 Watch the animation and think about questions. In the mythical story, 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...

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Update Time: 2024-09-22

This template belongs to science courseware E-education edition sixth grade science volume 2 industry PPT template

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