1、A comet,The Universe,The universe is a huge wide-open space that holds everything from the smallest particle to the biggest galaxy.No one knows just how big the Universe is.,Scientists believe that about 13.7 billion years ago,a powerful explosion called the Big Bang happened.This powerful explosion
2、 set the universe into motion and this motion continues today.Scientists are not yet sure if the motion will stop,change direction,or keep going forever.,the Earth is our home.Were living on the Earth,and it is the most beautiful in the solar system.It has lots of water and plants.And the moon is th
3、e Earths partner.It goes around the Earth.And other planets are very far from the Earth.So the people cant reach them and none of them has an environment with air.The people also cant live in them.,黑洞,A black hole is a strong gravity of objects.And it cant have been engulfing material.,According to
4、the latest superstring theory(超弦理论).Our universe is eleven dimensional(维),十一维空间,三维空间,Taurus the crab nebula金牛座蟹状星云,Cygnusopen clusters天鹅座 疏散星团,人马座礁湖星云,The Andromeda nebula 仙女座星云,猎犬座球状星团,CanesvortexNebula 猎犬座旋涡星云,It is the center of the Milky Way galaxy about 25000 light years away,There is much beautiful and magic view in the universe.,