-->We see objects in space because of their light. Stars produce their own but others, such as the Moon and planets, shine by reflecting light.
-->Light travels at 299,800 km per second(186,287 miles per second) - faster than anything else.
-->Distant stars are seen as they were in the past - when the light left them.
-->The most distant galaxies we see are about 13 billion light years away, and as they were in the early Universe.
-->Light travels at 299,800 km per second(186,287 miles per second) - faster than anything else.
-->Distant stars are seen as they were in the past - when the light left them.
-->The most distant galaxies we see are about 13 billion light years away, and as they were in the early Universe.
