The Milky Way could fit inside
宇宙是銀河系的
10 million million million times.
一千億億倍
Our entire galaxy's just a dot on the landscape.
整個星系只是宇宙中的一個小點
In the observable universe,
在可觀測宇宙中
there are 170 billion galaxies just like it.
有一千七百億類似的星系
Janna Levin is a professor of theoretical astrophysics.
揚娜·萊文是一名理論天體物理學的教授
She'd like to put every single galaxy we can see on the map.
她想把可觀測到的每個星系都繪制出來
But, before she can do that,
但在此之前
it's vital to account
我們需要先弄清楚
for one of the most surprising features of the universe.
宇宙的一個驚人特征
Making a map of the whole universe
繪制宇宙之圖
is not like mapping a map of the United States.
不同于繪制美國地圖
It's an observational fact that,
據長久以來的觀測
if you look at the galaxies around us,
如果我們看周圍的星系
and the most distant galaxies that we can see,
以及離我們最遠的星系
they all appear to be moving away from us.
你會發現它們都在離我們而去
重點解釋:
1.look at (仔細地)看
例句:Don't look at me like that.
別那樣看著我。
2.appear to 看來似乎
例句:These stars appear to move around the North Star.
這些星星似乎環繞著北極星轉。
3.away from 離開
例句:He hasn't been away from home before.
以前他從沒有離開過家。