Show HN: A JWST/Hubble deepfield comparison on a zoomable/pannable map interface

Post by sph » Thu, Jul 14, 2022, 8:21 AM UTC

nabla9 wrote: post #7

JWST and Hubble have roughly similar angular resolution. Hubble marginally better. JWST needs larger mirror for the same angular resolution because it uses longer wavelengths. Hubble: 0.04 arcsec at 500 nm JWST: 0.068 arcsec at 2 μm The difference is in wavelengths, image quality, and light collecting ability (size of the mirror). Hubble has to stare longer into a same spot to collect the same amount of light as JWST…

Post by testcase_delta » Thu, Jul 14, 2022, 8:36 AM UTC

revskill wrote: post #4

These are annoying to me because lacks of real difference from a senior astronaut viewpoint. As a normal user, the only difference i could see is just "brighter", anything more to add to the details ? Else i could say, just the same.

Post by Synaesthesia » Thu, Jul 14, 2022, 9:04 AM UTC

atoav wrote: post #8

revskill wrote: post #4

These are annoying to me because lacks of real difference from a senior astronaut viewpoint. As a normal user, the only difference i could see is just "brighter", anything more to add to the details ? Else i could say, just the same.

JWST shows a much bigger part of the wavelength spectrum. That means it can image things that would just not show up in Hubble. E.g. think about far away galaxies that have been redshifted so much (due to the expanding universe) that they fell below the lower wavelength threshold of Hubble.

Post by Synaesthesia » Thu, Jul 14, 2022, 9:07 AM UTC

Post by hrnnnnnn » Thu, Jul 14, 2022, 9:32 AM UTC

Synaesthesia wrote: post #17

This isn't a real image of an exoplanet right? The one in the background. Nowhere does it say that, which I think is beyond the ability of even JWST, to resolve an exoplanet at 50 light years? https://www.nasa.gov/image-feature/goddard/2022/nasa-s-webb-...