Sci stupid here, I get the concept of looking back in time but how do they know the specific time frame they're looking at? big bang + 150m seen like very specific in space's term.
A though, 10b sound like a large sum of $$$ in science's term but is pocket change in military/mega corp term. And this is just wrong, there should be a gofundme page for mega sci project like this. 50% of the world donate $3 will get it done.
By the red shift, which is a very specific and easy to measure thing to within a very, very tight margin.
I think the critical missing piece there are type 1A supernovae. These are used as a "standard candle" so to say in that they WERE believed to all have approximately the same brightness. So distance correlates with brightness or lack there of. Thing is, we now find that there are at least 2 or 3 different types of 1As and as of yet, I don't think that's been rigorously reconsidered by cosmologist. They're working on it though.To be fair, it’s not quite as straightforward to relate redshift back to distance or age. Redshift tells us precisely how fast something is moving away from us, but there is a lot of theoretical physics and modeling of the expansion of the universe that goes into correlating that back to an age and absolute distance. It’s pretty fascinating how it’s done and even more fascinating how recent a science all of that is. Less than a hundred years ago we thought the Milky Way galaxy was the entire universe.
Woo-hoo. If you pray, now is the time.
They should have used a big helium balloon instead. It would have avoided all the complications of unfurling the shield and it would float the telescope back to the L2 point w/o the need for fuel.
Yeah but the redshift is the axis of that wheel of mathematics and he needed the tldr . If he Google's redshift it'll lead him down the rabbit hole he needs.To be fair, it’s not quite as straightforward to relate redshift back to distance or age. Redshift tells us precisely how fast something is moving away from us, but there is a lot of theoretical physics and modeling of the expansion of the universe that goes into correlating that back to an age and absolute distance. It’s pretty fascinating how it’s done and even more fascinating how recent a science all of that is. Less than a hundred years ago we thought the Milky Way galaxy was the entire universe.
Yes, core tenant of the expansion of the universe and our eventual isolation from the rest of it.Ex: if it's moving near or at speed of light, the light it emits never makes it out. I think? So this means there is actually a hard limit of how far we can see that are not bound by optics
Only if we develop FTL travel, and even then only if we travel somewhere else to observe a given galaxy. Can't observe photons that never reach our observatory, after all.Wonder if we will ever reach that limit or if optics will always be the real limit.
Billions, with a B.The fact that we can see light that is many millions of years old is incredible though.
The beginning of the universe. That's all.
I'm warning you. I have feminine intuition. It's sort of like a spidey sense. Oh, and when you're raised by 2 women, you are legally permitted to have feminine intution. M'kay?Hmm. I might have to buy a serger - my tshirts are always too long. Can't have them covering my crotchables.
OK, let me start with my standard caveat by saying I don't really get the connection yet, but there appear to be some issues with the inflationary version of the big bang and I think at the resolutions JWT will give astronomers, that supposed to give them more of the sort of data to iron this out.Well I'm not interested in going THAT far back, maybe only a couple hundred years, just to see who killed Kennedy ? That Origin Light would be pretty dull in comparison .
Well I'm not interested in going THAT far back, maybe only a couple hundred years, just to see who killed Kennedy ? That Origin Light would be pretty dull in comparison .
One thing to remember, too, the maximum relative speed is also the speed of light. So two objects moving away from each other at the speed of light still have a relative speed of C not 2C. Which is what causes the redshift.What's kind of crazy to consider is that if there is parts of the universe moving fast enough, it's probably possible that there is no visible light at all coming from it because of how fast it's moving. Ex: if it's moving near or at speed of light, the light it emits never makes it out. I think? So this means there is actually a hard limit of how far we can see that are not bound by optics. Wonder if we will ever reach that limit or if optics will always be the real limit. The fact that we can see light that is many millions of years old is incredible though.
After it reaches L2, there is a 6 month "commissioning phase". So no actual science till after July 2022 i guess.IIRC, JWT still needs to cool down it's mirrors once it reaches LG2. This is for the infrared detectors to observe faint heat signals in the universe.
So we'll have to wait months until the first images are collected.
I think the next step is the most important, deployment of the secondary mirror. If that doesn't work, the telescope can't see anything.
Once that's done I think it should be mostly adding mirrors and fine-tuning.
Just a thought, won't it be easier, safer, cheaper and faster(development time) to assembly in ISS with multi "shipments" then send off to L2?