- Sep 28 Tue 2010 11:38
- Sep 03 Fri 2010 15:49
|彰化民生分校 菁英班4A David Chiang|
Hello everybody, my name is David. I’m twelve years old. I like to play computer games. Today, I’m going to talk about the Universe.
The Universe is limitless. It exploded around one hundred and fifty billion years ago. In the universe, a lot of stars and constellations turn around and around. Inside the universe, there are galaxies. A galaxy has a lot of constellations and planets. Our galaxy is named The Milky Way. Inside The Milky Way, we live in a place called our Solar System.
How did our Solar System appear? Something exploded and became tiny stars. The ingredients of the tiny stars are dust, rock, and ice. A tiny star crashed into another tiny star and they exploded. Then, the stars or planets were born.
In our Solar System, there are eight big planets and one dwarf planet. A dwarf planet is what we call a small planet. We live on Earth. The closest planet to the sun is Mercury; on the other side of Mercury, Venus; after Venus, Earth; past Earth, Mars; Then, Jupiter. Next to Jupiter is Saturn. After Saturn, Uranus; past Uranus, Neptune. The last planet, the dwarf planet is Pluto. Every planet has an orbit. All the planets’ orbit around the sun.
What is a black hole? Some scientists think a black hole is not real. But, a satellite took pictures of a black hole. How did scientists know it was a black hole? That is because light can’t go through, so they had proof they exist.