GALAXIES AND THE UNIVERSEGalaxies are huge groupings of stars, planets, gas, and dust. Our sun is in the MILKY WAY galaxy, which measures about 100, 000 light-years across. That long thin milky bright shape across the middle of the night sky is made up of about several billion stars ...
根据SPIRALGALAXY部分的 have spiral arms, ELLIPTICAL GALAXY部分的 shaped like a huge egg 和 IRREGULAR GALAXY部分的 many other shapes of galaxies 可知,星 系主要是根据形状来进行分类的。故选A项。 7.C【解析】细节理解题。根据IRREGULAR GALAXY部分的many other shapes of galaxies that aren't spiral or...
Now consider a cluster of galaxies. Such clusters contain a great deal of matter, most of which is dark and invisible, as Zwicky had already proposed in the 1930s. Suppose that there is a galaxy far behind the cluster, and that it is, by chance, on the continuation of the line of ...
Types of Galaxies Hubble’s “tuning fork” diagram The Expanding Universe Another discovery by Hubble (1929) made by measuring the “redshift” of galaxies: All distant galaxies are moving away from Earth The farther away a galaxy is, the faster it is moving away The entire universe is expa...
Galaxies and the Universe CHAPTER 30 Which galaxy do we live in? Milky Way Planet<Solar System<Galaxy<Local Group<Galaxy Cluser<Supercluster<Universe Shape of the Milky Way The Milky Way is a spiral galaxy It is thought that Supermassive Black Holes are at the center of most galaxies, Includi...
根据IRREGULAR GALAXY部分中There are many other shapes of galaxies that aren’t spiral or elliptical. They all fit into irregular category.可知,不规则的星系部分中还有许多其他星系的形状不是螺旋或椭圆。它们都属于不规则的类别。由此可知,星系主要是根据形状来进行分类。故选A。 (3)题详解: 推理判断题。
1.For a time after it was discovered that there were other galaxies, the term "island universe" was applied to galaxies, but it has since fallen out of favor. 2.In some ways, it's still an appropriate term because traveling to another galaxy would be extremely difficult,...
根据前文"Asweallknow,theuniverseincludestheSunandEarth,theplanetsandmoons,thegalaxiesandstars(我们都知道,宇宙包括太阳和地球,行星和卫星,星系和恒星)"可知,选项C"That is,the universe includes space and everything in it(也就是说,宇宙包括空间和其中的一切)"承接上句,进行了概括及进一步的解释,符合题意...
Galaxies in the Universe (NGC 3718/29)Education
Galaxies in the Universe 作者: Linda S. Sparke / John S. Gallagher III 出版社: Cambridge University Press副标题: An Introduction出版年: 2007-2页数: 442定价: USD 79.00装帧: PaperbackISBN: 9780521671866豆瓣评分 7.7 31人评价 5星 25.8% 4星 32.3% 3星 35.5% 2星 3.2% 1星 3.2% ...