>>91885440>>91885833I'm winging it hard from what little I recall, you'll have to ask /sci/ for factual specifics but I believe
0.Really fast is an understatement. Tachyons are particles that can only ever move FTL.
1.5.They've never been observed.
2.Because of E=MC and their FTL property shenanigans they are a bit of a bizarro particle. In theory the more energy they lose the faster they move, the more energy they gain the slower they become but just as it takes an infinite amount of energy to make regular particles breach FTL it takes infinite energy to make a tachyon move below FTL.
It's tricky to say all speedsters, or even Speed Force Conduits, convert to or produce tachyons since the means which they achieve FTL isn't the same as a Tachyon. Some slow things down around or alter their space-time frame of reference so their actions appear faster, some literally acquire infinite energy and just go fast.
To get back to the original point I doubt any amount of speed or time travel could surprise Manhattan as he has a panchronal perspective. Which means he's aware of everything that has, is and will happen, to him anyway. The tachyons worked because upon interacting with him they likely caused the FTL telephone problem where he was receiving information about an event outside its regular order of events.
The best way to imagine it is as Moore described. Manhattan sees time like we do a comic page. Except he can see all the panels at once. The reason it can be made sense of though is because it happens in a particular order. Whether or not he chooses to skip back or ahead there's a logical flow. If someone were to suddenly insert a panel from the end of the comic in the middle it wouldn't make sense though. Then again Jon never seemed to care about the sense of things occurring in sequence, but I guess when he was specifically asked to explain what's going on or would happen and couldn't it bothered him.
