彗星长尾巴 · Comet Long Tail
彗星长尾巴
Comet Long Tail
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抬头看星空——彗星平时是个冷冰冰的“脏雪球”！
Look up at the stars — A comet is usually just a freezing 'dirty snowball!
📖 趣味知识 / Fun Fact
huì彗xīng星píng平shí时shì是gè个lěng冷bīng冰bīng冰de的“zàng脏xuě雪qiú球”。dāng当tā它kào靠jìn近huǒ火rè热de的tài太yáng阳shí时，shēn身shàng上de的bīng冰kuài块hé和huī灰chén尘jiù就huì会bèi被jiā加rè热，róng融huà化zhēng蒸fā发chū出liǎng两tiáo条zhǎng长zhǎng长de的wěi尾bā巴：yī一tiáo条shì是liàng亮jīng晶jīng晶de的qì气tǐ体wěi尾bā巴，zǒng总shì是shén神qì气dì地zhǐ指zhe着bèi背duì对tài太yáng阳de的fāng方xiàng向；lìng另yī一tiáo条shì是wān弯wān弯de的huī灰chén尘wěi尾bā巴，xiàng像báo薄shā纱yī一yàng样gēn跟zài在guǐ轨dào道hòu后miàn面。zhè这xiē些piāo漂liàng亮de的wěi尾bā巴kě可yǐ以zhǎng长dá达jǐ几bǎi百wàn万gōng公lǐ里ne呢！zhù著míng名de的hā哈léi雷huì彗xīng星dà大yuē约měi每qī七shí十liù六nián年cái才huì会huí回dào到dì地qiú球fù附jìn近yī一cì次，xǔ许duō多rén人yī一shēng生zhǐ只néng能jiàn见tā它yī一liǎng两cì次，rú如guǒ果kàn看dào到le了，nà那kě可zhēn真shì是tài太xìng幸yùn运la啦！
A comet is usually just a freezing 'dirty snowball.' When it gets close to the hot Sun, its ice and dust are heated up, evaporating into two long tails: one is a shiny gas tail that always proudly points directly away from the Sun; the other is a curved dust tail trailing along its orbit like a light veil. These beautiful tails can stretch for millions of kilometers! The famous Halley's Comet only returns to Earth about once every 76 years. Many people only get to see it once or twice in their lifetime, so seeing it is truly lucky!
🤔 Why?
为什么彗星长尾巴这么有趣？
Why is Comet Long Tail interesting?
当它靠近火热的太阳时，身上的冰块和灰尘就会被加热，融化蒸发出两条长长的尾巴：一条是亮晶晶的气体尾巴，总是神气地指着背对太阳的方向；另一条是弯弯的灰尘尾巴，像薄纱一样跟在轨道后面。
These beautiful tails can stretch for millions of kilometers!.
👧 Compare With You
你抬头看天空的方式，和今天学的太空知识有什么联系？ How does looking at the sky connect to today's space fact?
- ✔ 晚上看月亮星星 Watch the moon and stars at night
- ✔ 问关于宇宙的问题 Ask questions about the universe
- ✔ 阅读太空绘本 Read space picture books
- ✔ 彗星靠近太阳时，冰和灰尘被加热蒸发，形成两条长长的尾巴： 彗星靠近太阳时，冰和灰尘被加热蒸发，形成两条长长的尾巴：一条是气体离子尾，总是被太阳风吹向背对太阳的
- ✔ 尾巴可以长达几百万公里，但非常稀薄，像宇宙里的轻纱 尾巴可以长达几百万公里，但非常稀薄，像宇宙里的轻纱
- ✔ 哈雷彗星大约每七十六年才回来一次，很多人一生只能见一两次 哈雷彗星大约每七十六年才回来一次，很多人一生只能见一两次
- ✔ 和“彗星”有关 Related to comet
- ✔ 和“尾巴”有关 Related to tail
📚 Vocabulary
💬 Learn Sentences
huì彗xīng星píng平shí时shì是gè个lěng冷bīng冰bīng冰de的“zàng脏xuě雪qiú球”。
A comet is usually just a freezing 'dirty snowball.' When it gets close to the hot Sun, its ice and dust are heated up, evaporating into two long tails: one is a shiny gas tail that always proudly points directly away from the Sun; the other is a curved dust tail trailing along its orbit like a light veil.
dāng当tā它kào靠jìn近huǒ火rè热de的tài太yáng阳shí时，shēn身shàng上de的bīng冰kuài块hé和huī灰chén尘jiù就huì会bèi被jiā加rè热，róng融huà化zhēng蒸fā发chū出liǎng两tiáo条zhǎng长zhǎng长de的wěi尾bā巴：yī一tiáo条shì是liàng亮jīng晶jīng晶de的qì气tǐ体wěi尾bā巴，zǒng总shì是shén神qì气dì地zhǐ指zhe着bèi背duì对tài太yáng阳de的fāng方xiàng向；lìng另yī一tiáo条shì是wān弯wān弯de的huī灰chén尘wěi尾bā巴，xiàng像báo薄shā纱yī一yàng样gēn跟zài在guǐ轨dào道hòu后miàn面。
These beautiful tails can stretch for millions of kilometers!.
🎤 口语练习 / Speaking Practice
请跟着读： Repeat after me:
dāng当tā它kào靠jìn近huǒ火rè热de的tài太yáng阳shí时，shēn身shàng上de的bīng冰kuài块hé和huī灰chén尘jiù就huì会bèi被jiā加rè热，róng融huà化zhēng蒸fā发chū出liǎng两tiáo条zhǎng长zhǎng长de的wěi尾bā巴：yī一tiáo条shì是liàng亮jīng晶jīng晶de的qì气tǐ体wěi尾bā巴，zǒng总shì是shén神qì气dì地zhǐ指zhe着bèi背duì对tài太yáng阳de的fāng方xiàng向；lìng另yī一tiáo条shì是wān弯wān弯de的huī灰chén尘wěi尾bā巴，xiàng像báo薄shā纱yī一yàng样gēn跟zài在guǐ轨dào道hòu后miàn面。
These beautiful tails can stretch for millions of kilometers!.
🎯 Fun Challenge
Multiple Choice彗星的气体尾巴通常指向哪个方向？
Which direction does a comet's gas tail usually point?
💡 想一想刚才读到的内容。 Think about what you just read.
答对了！气体尾巴总是神气地指着背对太阳的方向。 Correct! A comet's gas tail always points proudly away from the Sun.
💭 Think About It
关于彗星长尾巴，你还想知道什么？
What else would you like to know about Comet Long Tail?
哇！ Wow!
zhù著míng名de的hā哈léi雷huì彗xīng星dà大yuē约měi每qī七shí十liù六nián年cái才huì会huí回dào到dì地qiú球fù附jìn近yī一cì次，xǔ许duō多rén人yī一shēng生zhǐ只néng能jiàn见tā它yī一liǎng两cì次，rú如guǒ果kàn看dào到le了，nà那kě可zhēn真shì是tài太xìng幸yùn运la啦。
Many people only get to see it once or twice in their lifetime, so seeing it is truly lucky!.
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