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The James Webb Telescope
- Thread starter olbriar
- Start date
looks like a scene from Star Trek....lol
There's a lot of gravitational lensing going on there.
Yeah, it's going to be a fun instrument.
Yeah, it's going to be a fun instrument.
Amazing images, I see new wallpapers in my future...
I saw a comparison picture of the same spot in space (a space taken up by a grain of sand held at arm's length) taken with the Hubble telescope. There really is no comparison. 
I think we are in for a treat going forward.
I think we are in for a treat going forward.
Yep, they were trying to focus on a star and make adjustments - the instrument that captured the photo isn't even designed to do science, since its job to to point everything else around in the sky. But virtually everything in the field of view is a GALAXY!
I found a site that provides a slider you can move across from Hubble to Webb. It's a cool way to compare the two technologies.
https://johnedchristensen.github.io/WebbCompare/
https://johnedchristensen.github.io/WebbCompare/
There is definitely a difference between the two technologies. There is also a slight price difference... 1.5 billion dollars compared to 10 billion dollars.
A couple of decades of technology difference plus bigger mirrors. 
Of course the JWST is also optimised for infra-red, whereas Hubble ranges from UV to IR. This gives it an advantage for distant objects, since they will be red-shifted (that's distant in intergalactic terms: anything in our local cluster is "nearby" in this context)
Of course the JWST is also optimised for infra-red, whereas Hubble ranges from UV to IR. This gives it an advantage for distant objects, since they will be red-shifted (that's distant in intergalactic terms: anything in our local cluster is "nearby" in this context
)
svim
Extreme Android User
Ouch!
Previously reported micrometeorite damage was expected and stated to be more or less a non-event. Now it's something that's turning to be a bit more significant. Let's hope this doesn't later get revealed to be even more of an actual problem.
https://www.neowin.net/news/james-webb-space-telescope-suffered-concerning-but-mitigable-damage/
https://arxiv.org/ftp/arxiv/papers/2207/2207.05632.pdf
Previously reported micrometeorite damage was expected and stated to be more or less a non-event. Now it's something that's turning to be a bit more significant. Let's hope this doesn't later get revealed to be even more of an actual problem.
https://www.neowin.net/news/james-webb-space-telescope-suffered-concerning-but-mitigable-damage/
https://arxiv.org/ftp/arxiv/papers/2207/2207.05632.pdf
No kidding. Talk about a lot of science, years, and dollars lost. I'm with you and hoping for the best.
As the preprint on arXiv notes, the overall rate of micrometeor strikes is consistent with expectation. One causing a significant effect already is unexpected, but you can't tell from one event whether the expectation is wrong or you just got unlucky and got a bad hit early on.
It's like if you pick up one of those dice they use in roll-playing games, roll it once and it comes up 20, that doesn't tell you that the die is biassed. The only way to know is to keep rolling it and see whether over time you get more 20s than you expect.
It's like if you pick up one of those dice they use in roll-playing games, roll it once and it comes up 20, that doesn't tell you that the die is biassed. The only way to know is to keep rolling it and see whether over time you get more 20s than you expect.
The James Webb Space Telescope was designed with so much redundancy it's almost ridiculous. When you have ONE CHANCE to launch a $10 billion telescope, and drop it into a halo orbit around a moving pinpoint spot a million miles away, however, it's good to have enough backup to continue the mission... if even several things go wrong. Virtually nothing did.
The launch was perfect. The deployment was perfect. The insertion burn to place the telescope into its final orbit around Lagrange Point 2 (LP2) was deliberately overestimated: but even it was a perfect insertion, leaving enough propellant onboard to nearly double the telescope's projected 5-year lifespan. With the large number of hexagonal mirrors focused into a single image, the telescope could lose several of them to meteorites with no degradation in science.
The minor hit it took was quickly corrected with adjustments to the mirror segment, so it's of virtually no consequence at all. Once final commission is complete (within the next few weeks), humanity will be astounded by the data it sends back from the very edge of creation, immediately after "Let there be light" and the resulting Big Bang*.
*- (That is my personal opinion and belief that true science and creation are mutually confirming, and not mutually exclusive)
The launch was perfect. The deployment was perfect. The insertion burn to place the telescope into its final orbit around Lagrange Point 2 (LP2) was deliberately overestimated: but even it was a perfect insertion, leaving enough propellant onboard to nearly double the telescope's projected 5-year lifespan. With the large number of hexagonal mirrors focused into a single image, the telescope could lose several of them to meteorites with no degradation in science.
The minor hit it took was quickly corrected with adjustments to the mirror segment, so it's of virtually no consequence at all. Once final commission is complete (within the next few weeks), humanity will be astounded by the data it sends back from the very edge of creation, immediately after "Let there be light" and the resulting Big Bang*.
*- (That is my personal opinion and belief that true science and creation are mutually confirming, and not mutually exclusive)
Absolutely crazy beautiful!
Wallpaper material
It is like every sci-fi book cover I've read in the last 30 years. Wicked cool.
Space pics make fabulous wallpapers for my setup and this no exception! I have bees right now but really may have to think about changing them.