There is nothing more important than the sun.Without the sun all living things on the earth will die.
The sun is a star.In the sky there are thousands of starts like the sun.they are as large as the sun and as hot as the sun.At night you can see many stars,but in the daytime you can see only one star,the sun.
The sun is much nearer to us than any other star.That is why it looks the biggest and the brightest of all the stars.The distance of the sun from the earth is as much as 150 million kilometers.Most of the stars are thousands of light years away from the earth.
Do you know the light year?Nothing in the world travels faster than the light.It travels 300,000 kilometers a second( one sixtieth of a minute).And one light year is the distance that travels in one year.
沒(méi)有什么比這更重要,比太陽(yáng).沒(méi)有太陽(yáng),地球上的所有生命的,必將死亡.
太陽(yáng)是恒星.天空中有成千上萬(wàn)顆像太陽(yáng)一樣.它們和太陽(yáng)一樣大,一樣熱.晚上你能看到許多的星星,但在白天你只能看見(jiàn)一顆星星,那顆就是太陽(yáng).
太陽(yáng)距離我們比其他恒星近得多.這就是為什么它在所有的星星里看起來(lái)最大、最亮.太陽(yáng)與地球的距離達(dá)一億五千萬(wàn)公里.大部分的恒星距離地球成千上萬(wàn)光年之外
你知道光年嗎?在這個(gè)世界上,沒(méi)有什么比光傳播得快.光一秒鐘能跑30萬(wàn)公里(一分鐘的60分之一).一光年就是光一年所跑的距離.