Author Topic: Anyone else excited/nervous about the upcoming James Webb Telescope launch?  (Read 10551 times)


littleman

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Pretty great stuff!

Hubble vs JWST

BoL

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BoL

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Another comparison page Compare Webb's Images to Hubble

ergophobe

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Wow. Those comparisons are stunning.

What surprised me the most is looking outside the main object at the dark sky and seeing how much of the "dark" sky is no longer dark.

I don't know anything about astronomy - are these never-before-seen objects, or objects seen with other telescopes (i.e. the best terrestrial scopes), just not the Hubble?

Also as I understand it, these are all "translations" - there's only a small amount of overlap - Hubble primarily sees in the 0.1-0.8 micron range (UV and visible) while Webb is primarily 0.6-25 microns (IR). So they really aren't "seeing" the same stuff and when NASA presents us with viewable, visible images, it's effectively some sort of artist's rendition of what shows up on the telescope.

https://www.jwst.nasa.gov/content/about/comparisonWebbVsHubble.html

That article has a cool graphic showing how far back in time they see. Hubble can see back to the end of the "toddler" galaxy period, while Webb sees to the very beginning of it and beyond to the formation of early stars.

That, by the way, is why Webb is in the near-IR. Because of red shift as the universe expands, the light from the oldest galaxies and early stars is in the near-IR range (another thing I just learned from that article)

It is staggering.

ergophobe

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JWST captures aftermath of galactic collision (Cartwheel Galaxy)

https://webbtelescope.org/contents/news-releases/2022/news-2022-039