Yes, you can look into the past. All you have to do is stare at the sky
Our
senses are stuck in the past.
There’s a flash of lightning, and then seconds pass until we hear the rumble of
distant thunder. We hear the past.
We are seeing
into the past too.
While
sound travels about a kilometre every three seconds, light travels 300,000
kilometres every second. When we see a flash of lighting three kilometres away,
we are seeing something that happened a hundredth of a millisecond ago. That’s
not exactly the distant past.
But
as we look further afield, we can peer further back. We can see seconds,
minutes, hours and years into the past with our own eyes. Looking through a
telescope, we can look even further into the past.
If
you really want to look back in time, you need to look up.
The
Moon is our nearest celestial neighbour - a world with valleys, mountains and
craters. Read
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