The Hubble Space Telescope has spotted the oldest known galaxy in existence.
13.2 billion light years away...
It's hard to grasp just how far that is. Light emitted 13 billion years ago has finally reached Hubble's eyes.
We know it takes 8 minutes for sunlight to reach the Earth. So, when you look at the sun, you're actually seeing the sun as it was 8 minutes ago.
It's the same with stars. By the time we see the light, the star may not exist anymore. It's a strange feeling when you think about it. When we look at the night sky, we're getting a glimpse into the past.
The question is: How much can we not see?
I hope to see as much of the world as I can during my travels -- both with my eyes and my mind.
哈柏太空望遠鏡發現了最古老的星系。這個星系離地球大約132億光年遠。很難想像是多遠・・・ 應該說哈柏終於看到了132億年前發出的光。
太陽光到地球要8分鐘。所以你看太陽的時候、其實你在看8分前的太陽。
星星也一樣。我們看到星光的時候、那個星可能已經不存在了。看天空中的星星等於、我們在看過去。
我們看不到的東西有多少呢?
我希望我在旅行的時候、能看很多東西。
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