"Exploring the Universe" Universe PPT courseware

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"Exploring the Universe" Universe PPT courseware

We have already understood that the solar system is a celestial system centered on the sun, a star, and composed of planets, satellites, dwarf planets, small celestial bodies (including asteroids, comets), etc.

Most of the stars we observe in the sky are stars that shine and heat like the sun, and some of them will form a celestial system similar to the solar system.

During stargazing, the shining band of Milky Way light we see in the sky is actually a star group composed of many stars, which is called the Milky Way. The Milky Way is composed of approximately 100 billion to 200 billion stars and has a diameter of 100,000 light-years.

Common sense: A light year is the distance traveled by light in a year. It is a unit of length used to measure the distance between stars. The propagation speed of light is 300,000 kilometers per second.

Do the math:

One light year equals how many millions of kilometers?

30×60×60×24×365=9460800 million kilometers

The Milky Way is the galaxy to which the Earth and Sun belong. It is named after the bright band whose main part is projected on the celestial sphere and is called the Milky Way in my country.

The Milky Way is in the shape of a spiral, with four spiral arms extending evenly and symmetrically from the center of the Milky Way. The center of the Milky Way and the four spiral arms are places where stars are densely packed. Seen from a distance, the Milky Way looks like a large discus used for physical exercise. The diameter of the discus is 100,000 light-years, and the thickest part in the middle is about 3,000 to 6,500 light-years. The Sun is located in a spiral arm called the Orion Arm, about 33,000 light-years from the center of the Milky Way.

Summary: Do you understand: What exactly is there in the universe?

There are celestial body systems of different sizes distributed in the universe.

The universe is moving, changing, and expanding, and the celestial bodies that make up the universe are also moving and changing.

At present, our country's aerospace technology occupies a very important position in the world. The successful launch of the Long March series of launch vehicles and the manned spacecraft "Shenzhou 5" and "Shenzhou 6" fulfilled the Chinese people's dream of flying into the sky.

my country's manned spacecraft "Shenzhou 9" was successfully launched. The Chinese achieved manual rendezvous and docking for the first time, and were able to penetrate the capsule into the Tiangong-1 target aircraft, where they lived in space for 13 days and conducted scientific research experiments. This shows that our country has the ability to build a space station; the "Chang'e" 2 lunar exploration satellite was successfully launched. In the near future, our country's astronauts will also land on the moon for inspection.

The universe - boundless

Explore the universe - infinite and knowable

The universe—moving, expanding, and full of energy

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"Exploring the Universe" Universe PPT download:

"Exploring the Universe" Universe PPT Download Part One: The Expanding Universe The solar system is a celestial system centered on the sun, the star, and composed of planets, satellites, dwarf planets, small celestial bodies (including asteroids, comets), etc. In the sky we observe...

"Exploring the Universe" Universe PPT:

"Exploring the Universe" Universe PPT Part 1: Introduction to the new lesson. Recall, what kind of galaxy is the solar system? Is the solar system unique in the universe? The solar system is centered on the sun, the star, and consists of planets, satellites, dwarf planets, and small celestial bodies (including small...

"Exploring the Universe" PPT courseware:

"Exploring the Universe" PPT courseware Part One: The Origin of Constellations 1. Ancient Babylon connected some bright stars in the sky with imaginary lines and gave them mythical images, which they called: constellations. 2. The ancient Greeks divided the sky into 48 constellations. 3.Ancient times..

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Update Time: 2024-11-25

This template belongs to science courseware Science Edition for Sixth Grade Science Volume 2 industry PPT template

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