posted on Apr, 29 2013 @ 04:09 PM
reply to post by Raud
Yes, with there being so much space, it's easy for objects to miss each other. Until you take the time to ponder it, it can seem like this is not the
case. I think people often forget that space "operates" in 3-d, giving even more opportunity for objects to spread out and be "diluted". It's
actually very hard to get your head around just how much space there is out there, even in our solar system alone.
For example, think about two small boats, one leaving the USA and heading for the UK, and the other doing the opposite. Both boats navigating by
compass alone (no sat-navs). The chances of them even seeing each other at the half-way point are tiny - let alone them colliding. We are just talking
2-d here too! Now with space, the distances involved are many many times those in my example.
It's also true that Earth (or rather "Earth's atmosphere") gets hit by objects every day, but the vast majority are tiny. Much of this debris is
from comets, and some are fragments of asteroids. But there is also a percentage that will have come from collisions between objects/planets in space
- collisions that have been occurring for billions of years, especially when the solar-system was young and there was much more debris/objects flying
Over billions of years much of this debris has either been sucked up by the Sun's gravity or has been swept up by the the planets, especially the
gas-giants like Jupiter and Saturn, but the odd bit still remains (mostly concentrated in the Oort cloud, the Kuiper belt, and the asteroid-belt), and
we can see this debris entering the atmosphere on any given night when it's clear. Much of it will have been orbiting the Sun, and missing us for
hundreds/thousands/millions of years before it finally ends up hitting.
Probably my favorite past time is to go out on a clear night to observe this debris hitting and just ponder how amazing it all is!