DarkAntimatter

So a confidence interval around the measurement would lie mostly in the negative energy squared region (and therefore imaginary mass)? Or what am I misunderstanding?

So if the impactor spaceship could be made to bounce back off the asteroid at the negative of its impact velocity it would impart twice the momentum change on the asteroid than if it just embeds itself? Assuming nothing is ejected.

Definitely a milestone. Lots more to do, as you say. The first powered heavier-than-air flight of the Wright brothers lasted 3 1/2 seconds.

Sounds like there will be a "major announcement" on Tuesday morning US Easter time.

Its a staff in Lord of the Rings and a wand in Harry Potter.

I'm beginning to wonder if I can buy stock in FLO.

With RF and microwave signal handling a common component is a circulator. This is a device with 3 or more signal connections (ports). For a 3-port device, for example, if a signal is sent to port 1 almost all of the signal will come out of port 2 and hardly any out of port 3. But if a signal is sent to port 2 almost all of the signal with come out of port 3 and hardly any out of port 1. These devices are often made from material which is anisotropic. A simpler version of the same thing is a 2 port device called an isolator where almost all the signal input to port 1 flows to port 2 but almost no signal input to port 2 flows to port 1. Another example is the ionosphere where two-way radio operators in the 20'th century noticed that occasionally one person could hear the other but not vice versa, which was traced to anisotropies in the ionosphere. In all those cases, the effective permeability and permittivity of the medium is direction-dependant and so, in general, the speed of light will be direction-dependant for these situations.

If man were meant to fly he'd have wings! 😜

Been reading this thread with interest and it just occurred to me that Mr Spock from an alternate timeline started this discussion. This is spooky.

Well, we've progressed from always 30 to always 10? I'm not sure if this is a convergent sequence or not.

What's often not made clear in the press is that at the laser fusion facility at Lawrence Livermore (and maybe others by now) they have been getting more energy out than used to ignite the.fusion reaction since 2014. Since not all energy put in is delivered to the pellet, the overall efficiency is still less than one, and that is what matters. I think this latest achievement is important for the large amount of energy produced.

I have a glass solar filter that fits over the aperature, not one at the eyepiece end. I'm happy with it, but have never compared with any other type. Now I'm also curoius about a comparison of glass, film, and wedges. Regarding wedges, is there any danger to the scope in having the filter at the eyepiced end? With an aperature filter, the light intensity is attenuated before it gets into the scope at all. With filters at the other end, do we need to worry about heating of secondary mirrors, etc?

How important is it for glass solar white light filters to be optically flat? What are the effects of their not being optically flat?

A satellite blowing up seemed to cause a lot of carnage. Imagine something like that blowing up on the surface of the earth. Bombs larger than that (unfortunately) go off frequently and the damage area is small compared with the earths surface. The region a few hundred of miles above the earth is even larger than the earth's surface. Granted there is no atmosphere to stop pieces from orbiting. Also, I didn't understand why the Chinese station was all of a sudden falling into the atmosphere.

So is our present day world the result of future time travellers constantly having gone back in time and stirred things up, or do they have rules against that sort of thing and this is the "unmodified" time stream?