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Comment No need for public record (Score 1) 468

I don't need to know if you have voted to send you two letters, one which says "You have a excellent voting record" and "You have a bad voting record". That's classic astrology stuff. Just send letters with something which applies to everyone. It's working, you have decided that the first one was a personalized letter and the second is one that they have send to everyone, while your neighbor that doesn't vote just think the opposite.

Comment Re:Politically correct travel restrictions claptra (Score 3, Interesting) 294

So your point is that these people don't follow your advices (even if you are the top expert in epidemiology) and this as lead to a disastrous situation in the US

You mean the same experts who gave the OK for Amber Vinson to fly knowing she was exposed and had a fever?

How many people have been infected by contact with Amber Vinson?

Or the doctor who returned from Guinea who admitted he wasn't feeling good but decided to ride the subway multiple times, go bowling and eat out?

How many people have been infected by contact with this doctor?

Comment Re:"Contrary to what we were sometimes taught" (Score 1) 232

The "gravity constant" that you are describing is the gravity acceleration at the earth surface due to the earth (where you may or may not have subtracted the centripetal acceleration due to the earth rotation) which changes with the position on earth mainly due to the fact that the distance from the surface to the center of the earth is changing (due to flattened at the poles and bulges at the equator). So this is more a change with location than a change with time. The ESA studies is more about the measurement of the earth gravitation from "outside" the earth, to create a model for orbit evolution with time. (Jn parameters, with n>= 2) And they study this evolution in time, for all location. So it's not exactly the same.

(Anyway, the g that you talk about can be seen as an evaluation of the Jx modelisation at earth surface so this is of course related. Bu the study is more about time change than space change)

Comment Re:A good slice of luck. (Score 1) 35

The goal is get more information about comets. The only way to reduce the luck in the mission is to get more information about comets. You could probably make two mission, the first one studying a comet, the second one having a landing device. But you will not be sure that the second comet that you visit is similar to the first one. And it will cost a lot more. So adding a secondary landing probe to Rosetta, even if it may fail, is a cheaper solution, yet relying on some luck.

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"Here's something to think about: How come you never see a headline like `Psychic Wins Lottery.'" -- Comedian Jay Leno

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