Water, Water Everywhere? A Highly Surprising Graphic

If all the water in the world were collected and put next to the planet Earth, it would look like this:

waterlessearth_woodshole_960

After seeing this, it seems much more plausible that all our water came from comets and asteroids. It also makes our planet’s water seem even more precious.

There’s more here at NASA’s Astronomy Picture of the Day.

Up There

NASA has an interesting site called “Astronomy Picture of the Day”. The July 23rd entry is an extremely high speed film of lightning. The July 3rd picture of Saturn is also very good.

http://apod.nasa.gov/apod/archivepix.html

This is their photograph from 2010 July 20, possibly showing Zeus in action over Athens: