This picture shows a group of stars far away from Earth. Normally, you couldn't see them this well, but this picture was taken by a very powerful telescope.
The first time light from this group of stars came to Earth was in September 2002. But these stars have been shining much longer than that.
These stars started shining over 100 million years ago. The reason the light took so long to get to Earth is that these stars are so far away.
You might think that anything that takes 100 million years to get somewhere is slow, but light travels really fast. In space, where there is nothing to slow it down, light travels about 300 million meters in ONE second!
telescope n.
（單筒）望遠鏡
(wang4 yuan3 jing4)
travel v.i.
移動 (yi2 dong4)，旅行 (lu3 xing2)
Sam loves to travel. He visits a new country every year.
山姆熱愛旅行。他每年都會造訪沒去過的國家。
RSS