mild deep thoughts.

"Weight is calculated using mass and a gravitational field. You couldn't 'weigh' the Earth using itself as it's own gravitional force since it cannot exert force on itself." I think what he is asking for is let's say there is a superplanet that the earth could be landed on. Take the weight (in whatever units that planet would have), convert to earthly equivalents, what would the weight be. Alternatively (and easier to do) compute the mean density of the earth of a unit of volume. Multiply that by the volume of the earth and you would have its' weight.

[url]http://www.abc.net.au/science/news/stories/s122885.htm[/url] Jens Gundlach and Stephen Merkowitz from the University of Washington have found that the Earth weighs in at 5.972 sextillion (5,972,000,000,000,000,000,000) metric tons. While this is just a shade under the current textbook estimate of 5.98 sextillion metric tons

I'm actually thinking about googleing this...hehe.

Weight is calculated using mass and a gravitational field. You couldn't 'weigh' the Earth using itself as it's own gravitional force since it cannot exert force on itself.

selden, you obviously have way too much time on your hands to be coming up with stuff like that...:D