planetesimals

/ˌplænɪˈtɛsɪməlz/

Meanings

noun

星子, 微行星

Any of many small, solid astronomical objects that orbit a star and form protoplanets through mutual gravitational attraction.

Examples :

"In the early solar system, dust and gas gradually clumped together, forming planetesimals, which then collided and merged to create the planets we know today. "

在早期的太阳系中，尘埃和气体逐渐聚集在一起，形成了许多星子 (微行星)，这些星子随后碰撞融合，最终形成了我们今天所知的行星。

Related Words

forming verb

/ˈfɔːmɪŋ/ /ˈfɔɹmɪŋ/

形成，构成

"Clouds were forming interesting shapes in the sky. "

天空中云朵正在形成有趣的形状。

through noun

/θɹuː/ /θɹu/

贯石, 穿石。

"The dry-stone wall used a large, flat through to support the top stones. "

这堵干砌石墙用了一块又大又平的贯石来支撑顶部的石头。

planets noun

/ˈplænɪts/

行星，星球

"Ancient astronomers observed that seven planets – the Moon, Mercury, Venus, the Sun, Mars, Jupiter, and Saturn – moved differently than the fixed stars. "

古代的天文学家观察到七个行星——月亮、水星、金星、太阳、火星、木星和土星——它们的运行轨迹与恒星不同。

gradually adverb

/ˈɡɹædʒuəli/

逐渐地，渐渐地，逐步地

"The plants gradually grew taller over the summer. "

夏天期间，这些植物渐渐地长高了。

protoplanets noun

/ˌproʊtoʊˈplænɪts/ /ˌproʊtəˈplænɪts/

原行星，行星胚胎。

"Scientists believe that protoplanets, formed from smaller space rocks, eventually crashed together to create the planets in our solar system. "

科学家们认为，原行星（行星胚胎）是由较小的太空岩石相互吸引形成的，最终它们相互碰撞，形成了我们太阳系中的行星。

astronomical adjective

/ˌæs.tɹəˈnɒm.ɪk.əl/ /ˌæstɹəˈnɑːmɪkəl/

天文的，天文学的

"My science class requires us to use astronomical charts to identify constellations. "

我的科学课要求我们使用天文图来识别星座。

gravitational adjective

/ˌɡɹævɪˈteɪʃənəl/

引力的，重力的

"The gravitational pull of the Earth keeps us on the ground. "

地球的引力把我们牢牢地拉在地面上。

attraction noun

/əˈtɹækʃən/

吸引力，引力

"The attraction of a good teacher to their students is often strong. "

一位好老师对学生的吸引力往往很强。

collided verb

/kəˈlaɪdɪd/

相撞，碰撞

"When a body collides with another, then momentum is conserved."

当一个物体和另一个物体猛烈相撞时，动量是守恒的。

together adjective

/təˈɡɛð.ə(ɹ)/ /təˈɡɛðɚ/

有条理的, 井井有条的。

"The teacher's lesson plan was together, covering all the key concepts logically. "

老师的教案很有条理，逻辑清晰地涵盖了所有关键概念。

objects noun

/ˈɒbdʒɛkts/ /əbˈdʒɛkts/

物体，东西

"The children collected colorful objects from the beach, like seashells and smooth stones. "

孩子们从海滩上捡起各种色彩鲜艳的东西，比如贝壳和光滑的石头。

clumped verb

/klʌmpt/

结块，成团。

"The wet sand clumped together in my bucket when I tried to build a sandcastle. "

我试着堆沙堡的时候，湿沙子在我桶里结成了一团一团的.