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adding 400kg of mass to a comet is an insignificant amount. according to this article's calculations, the hale-bopp is losing about 2x that mass every second. also, the article mentions that mass loss will not affect the orbit, however, velocity will. so, the comet's orbit will definitely change. fortunately the change will be practically immeasurable.

http://www.scienceweb.org/astro/comet/halebopp/tea ch/cq15.html

You wanna talk about the real thing vs CG? Just watch the documentary "Under pressure: Making of The Abyss" that comes on the special edition of The Abyss DVDs-- Cameron didn't want to use CG unless he absolutely had to, he wanted to the movie to look as realistic as possible. So instead of using CG they actually built the giant underwater base featured in the movie inside an uncomplete nuclear reactor tower and then filled it with 7 and a half million gallons of water, used real submersibles and ROVs and even had real aliens I heard :) The scenes where Ed Harris was "breathing oxygenated liquid" wasn't real though (but the rat scene was ). For those scenes, Ed Harris was just holding his breath and actually in one scene, between takes, almost drown. Since they were actually shooting the whole thing underwater he had to rely on his buddy divers to give him a spare regulator between takes for those scenes. Watch the documentary for details on the mishap.

Additionally James Cameron stayed underwater for most of his life during that time, and while decompressing he had enough time to review the film that was shot during the day. It was the most expensive movie shoot of all time, only to be eclipsed by Terminator 2, only to be eclipsed by True Lies, only to be eclipsed by.. dare I say it... Titanic.

And now for the good stuff. Apparently Deep Core, the underwater base in the Abyss STILL exists inside of that Nuclear Reactor, they never moved it! Well, 2 hero-nerds decided to sneak onto the property and check it out. The story is incredible and yes, they took pictures!!!

http://www.x-plane.com/adventures/abyss.html

After you read it and are able to find your jaw where you dropped it, give this a read on how hard The Abyss was to shoot (and FFS watch the documentary on the DVD!), then come back and mod this post up, for great jaw dropping justice!

I didn't know what Sodium Pentothal was, so I had to look it up. For those of you in the same boat as me, here's a good web page about it

That is, inertia in big science funding?

In 1995, the GP-B was described as the "only experiment ever devised to test [the existence of frame-dragging]."

However, in 1997 NASA announced that it had successfully tested frame dragging. See also here.

But when will we have "Liquid you can drink and not be accused of modding on crack"?

Your 1997 NASA link actually goes to the previous 1995 statement.

However, in 1997 NASA announced that it had successfully tested frame dragging. See also here.

However, in 1997 NASA announced that it had successfully tested frame dragging. See also here.

However, in 1997 NASA announced that it had successfully tested frame dragging. See also here.

However, in 1997 NASA announced that it had successfully tested frame dragging. See also here.

However, in 1997 NASA announced that it had successfully tested frame dragging. See also here.

In addition to the sensitivity problem, I wonder if this could be an experiment whose time has passed.

In 1995, the GP-B was described as the "only experiment ever devised to test [the existence of frame-dragging]."

However, in 1997 NASA announced that it had successfully tested frame dragging. See also here.

As opposed to breathing the fluorinert itself, of course!

In the middle 80's there was an series of experiments that followed the same guidlines. The scientests were looking for a chemical that could carry the oxygen to the cells that was not blood. At the time the best thing they found was a form of a flourocarbon that was liquod at room temperature. As I recall they drained the blood from a dog and replaced it with the flourocarbon and three days later they put the dogs blood back and the dog suffered no side effects. But them CFC's were found to be a carcinogyen (damn spelling) and the idea was droped due to the chemical symilarities. I guess they finally got over it because oxygent is a perflourocarbon.

On a sidenote the stuff that they used in the abyss is also a oxygenated perflourocarbon emulsion and it really does exist. See here for deatails on the early experiments.

Also see here under the technology heading for more info on reasearch into sythetic blood. Untill now PFC have been toxic which was a major downside to using them.