42. How many galaxies are there in the universe?相关知识点: 试题来源: 解析 How many galaxies are there in the universe? 这个问题询问宇宙中有多少个星系。由于宇宙的广阔无垠,我们无法准确地统计出所有星系的数量。但科学家估计,可观测宇宙中至少有数千亿个星系。
Before attempting to put a figure on the number of galaxies in the universe, we must first agree what we mean by a "galaxy" and how to define the boundaries of the universe. Traditionally, a galaxy is considered to be a large gravitationally bound cluster of stars and interstellar matter,...
Some of the faintest objects ever observed suggest that small galaxies get the credit for clearing the ‘fog’ pervading the early cosmos.
题目 12. How many galaxies are there in the universe? 13. What does a light-year mean? 14. Do you want to travel in space one day? Why or why not? 相关知识点: 试题来源: 解析 12. There are billions of galaxies in the universe. 13. A light-year is the distance that ligh...
44. Do you want to travel in space one day? Why or why not? Write 20 words or more.相关知识点: 试题来源: 解析 42. There are approximately two trillion galaxies in the universe. 43. A light year is the distance that light travels in one year in a vacuum, which is about 9.461×10...
44. Do you want to travel in space one day? Why or why not? Write 20 words or more. ___ ___ 相关知识点: 试题来源: 解析 42. There are approximately 2 trillion galaxies in the observable universe. 43. A light-year is a unit of length used to measure the distance that light trave...
定语从句和倒装句型。how many galaxies there are in the universe是宾语，而宾语又可改为陈述句为 there are how many galaxies in the universe，而本句又改为how many galaxies in the universe are there。
百度试题 结果1 题目9. No one knows how many galaxies (galaxy) there are in the universe. 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
t need to get concerned when it happens. Change is a good thing. And so, it’s with no big surprise that I need to update the estimate for the number of galaxies in the observable Universe. Until a couple of weeks ago, the established count for galaxies was about 200 billion galaxies...
百度试题 结果1 题目3. Nobody knows how many galaxies_(galaxy)there are in the universe. 相关知识点: 试题来源: 解析 答案见上 反馈 收藏