By measuring the motion of the galaxies in a cluster, astronomers can infer the cluster's mass.通过测量星系在一个星系团内的运动,天文学家们可以推定这个星系团的质量。They turned their telescopes towards other nearby galaxies...他们把望远镜转向附近其他星系。Space fli...
They turned their telescopes towards other nearby galaxies.他们把望远镜转向附近其他星系。Quasars are the highly energetic cores of distant galaxies.类星体是遥远星系的极为活跃的核心体.We still don't know how many galaxies there are in the universe....
每个搜索区域有大约包括赤纬10度,赤经一小时.Each search area is about 10 degrees in declination and one hour of right ascension.这个位置也以天球坐标形式显示在右下角(赤经和赤纬).The location is also noted in right corner in celestial coordinates Right Ascension and...
My health compels me to knock off work.我的健康问题使我不得不停止工作.The research compels him to spread out into other fields.这项研究工作迫使他去钻研其他的学问.Necessity, says the Greeks, compels the gods.希腊人说, 需要会迫使神祗俯首就范....