嗨,假如现在你有一艘速度可以达到光速(每秒30万公里)的宇宙飞船、太空旅行的第一站你打算去哪？“到银河系的中心逛逛吧,多好玩。”那就开始出发。太空真是热闹,你坐在宇宙飞船里,看见了一个个大星团向你招手,他们都100多亿岁了,颜色和形状就像红宝石、蓝水晶、黄玛瑙,美丽极了。正在你看得发呆的时候,忽然一条拖着大尾巴的彗星从你眼前调皮地跑过,准会吓你一跳。飞呀飞呀,大约3万年以后(嘻嘻,假如你能活到那时候),你离银河系中心很近了,不 Hi, if you now have a spacecraft that can reach a speed of light (300,000 kilometers per second), where are you going to go in the first leg of space travel? “Go to the center of the Milky Way, and have fun.” Start off then. Space is really lively, you sit in the spacecraft, saw a large group of stars waving to you, they are more than 10 billion years old, the color and shape like ruby, blue crystal, yellow agate, very beautiful. Suddenly when you look in a daze, suddenly a comet dragging his tail ran naughtyly from your eyes, will be scared you jump. Fly it fly, about 30,000 years later (hee hee, if you can live that time), you are close to the center of the galaxy, not