yè夜wǎn晚wǒ我men们tái抬tóu头kàn看xīng星kōng空，mǎn满tiān天de的xīng星xīng星shǎn闪shǎn闪fā发guāng光，hǎo好xiàng像dōu都guà挂zài在tóng同yī一kuài块hēi黑sè色de的dà大mù幕bù布shàng上。qí其shí实，tā它men们lí离wǒ我men们de的yuǎn远jìn近chà差jù距dà大dé得jīng惊rén人！lí离wǒ我men们zuì最jìn近de的héng恒xīng星jiào叫“bǐ比lín邻xīng星”，jí即shǐ使zuò坐shàng上yǔ宇zhòu宙lǐ里zuì最kuài快de的“guāng光sù速liè列chē车”，yě也yào要zǒu走sì四nián年duō多cái才néng能dào到dá达。zhè这lǐ里de的“guāng光nián年”kě可bù不shì是shí时jiān间dān单wèi位，ér而shì是guāng光kāi开zú足mǎ马lì力pǎo跑yī一nián年nà那me么zhǎng长zhǎng长de的jù距lí离。dà大duō多shù数xīng星xīng星lí离wǒ我men们yǒu有chéng成qiān千shàng上wàn万guāng光nián年nà那me么yuǎn远，suǒ所yǐ以kàn看qǐ起lái来zhǐ只shì是yī一gè个xiǎo小xiǎo小de的liàng亮bān斑。xiǎo小xióng熊māo猫gǎn感tàn叹：yòng用wàng望yuǎn远jìng镜néng能kàn看dào到gèng更duō多gèng更yuǎn远de的xīng星xīng星，yǔ宇zhòu宙mā妈mā妈de的dù肚zi子zhēn真de的chāo超jí级chāo超jí级dà大！

When we look up at the starry sky at night, the twinkling stars look like they are all hanging on the same big black curtain. In fact, the differences in their distances from us are mind-bogglingly huge! The closest star to us is called 'Proxima Centauri.' Even if you take the fastest 'speed-of-light train' in the universe, it would still take more than four years to get there. 'Light-year' here is not a unit of time, but the incredibly long distance that light travels in one full year. Most stars are thousands of light-years away, so they just look like tiny glowing dots. Little Panda says: Using a telescope reveals even dimmer and more distant stars; Mother Universe's belly is truly super, super huge!

👧 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?

📚 Vocabulary

💬 Learn Sentences

🎯 Fun Challenge

“光年”是用来衡量什么的单位？

What does a "light-year" measure?

💡 想一想刚才读到的内容。 Think about what you just read.