posted on Sep, 25 2012 @ 10:49 PM
Ok let see where to start first? Hhmmm.....
1) water is very heavy, meaning it has "mass", mass is the exact same thing as gravity, so yes it would would itself together just like any ice bal
"comet" or planet.
2) water can't boil if under pressure, so no, it would not "explode", this is quite silly actually. Why do you think water isn't "exploding"
under the ocean around open volcanic vents? Pressure will not allow it.
3) it would not evaporate and be difused in space, just like our water here n earth, "gravity" would hold it to the water ball. Except in the event,
that it was solid water entirely, it would just be slowly blown away by the solar wind, just like what happened to mars' atmosphere. As there was no
protective magnetic field to shield it.
Kinda fun thought experiment. I would think that we would all die before impact, as the tidal forces of 2 close high mass objects gravities began to
pull eachother apart. The first sign would be earth quakes with even increasing intensity, as we got closer to the "water world", followed by many
current and new volcanoes erupting all over the world, as it deformed from the gravity of the water wold. Tides would begin to grow bigger and bigger,
and bigger until they eventually reached thousands of miles high, as or proximity to the water wold increased.
Finally, we would all be long dead before we ever hit it, although the earth would feal the hit, all forms of advanced life would never even see it
get bigger than the moon before they all died off of natural geological activities, and global tidal activities, not to mention the tens of thousands
of mile and houjr wind that would tear the top few miles off the crust every day.
So ya it would suck a lot for a short time, then we would all day, weeks or even months before impact.