用Quizlet學習並牢記包含Where is the Asteroid Belt?、What is order of the Planets?、Where is the Oort cloud?等詞語及更多內容的單詞卡。
terrestrial planets 3 2/3 of the way out of one of the spiral arms 4 mercury, venus, earth, mars, jupiter, saturn, uranus, neptune 本學習集中的詞語(26) galaxies clusters of billions of stars, dust, and gas that are held together by gravity. ...
Protoplanets arebuilt up through the collisions of planetesimals over millions of years. The protoplanets orbit stably around the Sun for a while, but eventually they collide with each other. In about 100 million years, several terrestrial planets, like the ones found in our Solar System, are ...
terrestrial relating to the land Solar System sun, planets, and all the other objects that revolve around the sun greenhouse effect warming trapped by the atmosphere Equator circle around the middle of the earth Volcanic explosively violent; volatile ...