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Compare Webb's Images to Hubble

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Re: Compare Webb's Images to Hubble

#101

Earlier quoted context omitted.

Motion of what?

Minor changes to the satellite position? Vibration from some hardware? I dunno but the parent asks a question I ask too. When you do long exposure, any kind of movement, even very small, can degrade your image. How JWST handles movement during long exposure is a good question. Same with hubble.

long exposure images aren't actually 1 continuous exposure. you take a ton of individual images and composite them using known reference points.

Re: Compare Webb's Images to Hubble

#102

For the professional (or former professional) astronomers among us, I will make my somewhat amused observation that what people are most paying attention to is not really the distinguishing features of JWST. People seem most impressed by the apparent increase in resolution of the images, which is not from a certain point of view the hardest thing to do . HST might have done that if its instruments had been of differe…

Quoted post unavailable.

I think this is a little harsh, but I actually generally agree. I'm a total laymen here and my PRIMARY TAKEAWAY has been the IR component and how much more and further away you can see because of it.

Re: Compare Webb's Images to Hubble

#103
I'm actually most looking forward to seeing a picture of our planets. I wonder what kind of resolution we'll get of Jupiter and Mars in particular.

Also curious about what the closest stars to our solar system would look like. Of course it also makes me wonder what would we be able to see given a 100x increase in aperture. Like for example if we could send up something extremely large on Starship. Would we be able to image planets in our local group? Exciting!

Re: Compare Webb's Images to Hubble

#104

For the professional (or former professional) astronomers among us, I will make my somewhat amused observation that what people are most paying attention to is not really the distinguishing features of JWST. People seem most impressed by the apparent increase in resolution of the images, which is not from a certain point of view the hardest thing to do . HST might have done that if its instruments had been of differe…

Quoted post unavailable.

Apologies, I did not mean for it to come off that way. I edited it to not make such broad brush statements.

Certainly people here and discussing it among those who get to watch these announcements during their day, are a more knowledgeable and appreciative group of the details. They have the time and info to know the "new" aspect.

I was just making the point that in the most headline-grabbing and CNN/newspaper science-writer genre, probably their and their audience just sees the image sharpness as they flip through the news.

Re: Compare Webb's Images to Hubble

#106

Downvote me to hell, but as a person who has zero understanding of what differentiates Hubble from Webb, the pictures alone just aren't doing it for me. I was excited to see something completely new given 30 years and 10 billion dollars and instead I feel like I'm seeing what looks like an enterprise upgrade and feel slightly disappointed. What am I missing?

I can understand this sentiment, but I'm excited by the results we won't see: chemical spectra.

Getting readings from the atmospheres of exoplanets will give us an idea of what population and percentages could harbor life. We may even get a whiff of some tell tale signs of industry, and that would change life on earth forever.

Re: Compare Webb's Images to Hubble

#108

Downvote me to hell, but as a person who has zero understanding of what differentiates Hubble from Webb, the pictures alone just aren't doing it for me. I was excited to see something completely new given 30 years and 10 billion dollars and instead I feel like I'm seeing what looks like an enterprise upgrade and feel slightly disappointed. What am I missing?

What you're missing is the science and all the new data we'll find with an infrared telescope, which will come down the road. Yes it takes cool pictures, but that's just a bonus. JWT's real function is to facilitate hard science.

Re: Compare Webb's Images to Hubble

#109

For the professional (or former professional) astronomers among us, I will make my somewhat amused observation that what people are most paying attention to is not really the distinguishing features of JWST. People seem most impressed by the apparent increase in resolution of the images, which is not from a certain point of view the hardest thing to do . HST might have done that if its instruments had been of differe…

.. and why is infra-red more useful ? Can we see through dust or something ?

Re: Compare Webb's Images to Hubble

#110

For the professional (or former professional) astronomers among us, I will make my somewhat amused observation that what people are most paying attention to is not really the distinguishing features of JWST. People seem most impressed by the apparent increase in resolution of the images, which is not from a certain point of view the hardest thing to do . HST might have done that if its instruments had been of differe…

.. and why is infra-red more useful ? Can we see through dust or something ?

Infrared is the only way to see things that are cold (as in not a star) or extremely far away (due to redshift).
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