White dwarves are the remnants of stars like our sun that start to cool.But they’re still warm enough to keep a planet at a nice cozy temperature…if that planet is close enough.Say,10 to 100 times closer than Mercury gets to the sun.重点是“Say,10 to 100 times closer than Mercury...
B No two stars are the same. Each one, like our Sun, shines in its own way. There are lots of stars. How can scientists classify (分类) them?American astronomer Annie Jump Cannon created a classification system. She classified all the stars into seven groups. Till now, Cannon's system...
【题目】T here are__ stars in the galary,and our sun is only _ them.A. billions of; first ofB. billion of; one ofC. billions of; OA ot⊂OD. billion of; first of 相关知识点: 试题来源: 解析 【解析】【答案】【核心短语词汇】billions of:数十亿的【翻译】银河系有数十亿颗恒星,我们...
Red dwarf stars are the most common kind of stars in the Universe. These are main sequence stars but they have such low mass that they’re much cooler than stars like our Sun. They have another advantage. Red dwarf stars are able to keep the hydrogen fuel mixing into their core, and s...
首字母填空 The stars we see at night are really huge l1 our sun,but they are m2 far- ther away in space.Some of them have planets(行星)like our earth travelling a3 them. The stars are s4 hot that they give off great light and heat-more than the hottest,brightest fire you can imagi...
A black hole is created when a large star burns out. Like our sun, stars are unbelievably hot furnaces(熔炉) that burn their own matter as fuel. When most of the fuel is used up, the star begins to die. The death of a star is not a quiet event. First there is a huge explosion...
Stars spend 90 percent of their lives in their main sequence phase. Most of the stars, including the sun, are main-sequence stars. They exist in a state of nuclear fusion.”(当云层内部的温度上升到1500万摄氏度时,核聚变开始并进入生命的下一个阶段,即主序。恒星90%的生命都在主序阶段。包括...
燃爆全球的10首英文歌,当前奏响起就沦陷了 杜晓曦 顺德初中英语 2023-04-16 22:43 发表于广东 收录于合集 #英语珍藏 920 个 #英语积累 1000 个 #英文歌曲 22 个 今天顺德初中英语微信公众号您推出英文金曲 夏天的氛围。演唱者: 顺德区乐从第一实验学...
Our sun is near to us. It warms us and gives us light in daytime. The stars are not near. We can see their light only at night, and they do not warm us. The stars are not all the same. Many stars are quite like our sun. They are the same size, and they have the same col...
(1)句意:我们晚上看到的星星很小。根据The stars we see at night are really huge like our sun, but they are much farther away in space.可知夜晚看到的恒星像太阳一样巨大,故答案为错误。 (2)句意:地球绕着行星运行。根据Some of them have planets like our earth travelling around them.可知地球围...