James Webb Space Telescope, information, updates and discussion |
James Webb Space Telescope, information, updates and discussion |
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![]() Member ![]() ![]() ![]() Group: Members Posts: 134 Joined: 13-March 05 Member No.: 191 ![]() |
The manufacture of the JWST mirror blanks has now been completed.
Despite this milestone, the fate of JWST is still somewhat precarious, because although the scientific bang from the telescope is expected to be huge, the bucks required have increased to a staggering $4.5 billion. A Space.com article on the squeeze in NASA's space-based astronomy plans gives some background. The JWST home page can be found here. The Space Telescope Science Institute, which runs Hubble, also has a site here. As does ESA. |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2998 Joined: 30-October 04 Member No.: 105 ![]() |
First Webb image of Mars:
https://www.newscientist.com/article/233851...ctures-of-mars/ Re: image at top of article: "while the longer wavelength image reveals information about heat emitted from the Martian surface and atmosphere, as well as the concentrations of carbon dioxide in the atmosphere (bottom right, above)." Note that the Hellas Basin (lower left of the lower right) shows up darker, which is "cooler", but i would have expected that low elevation area to be warmer. But i wonder if the thicker column of atmosphere (CO2) would have an effect? ---Bill -------------------- |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2520 Joined: 13-September 05 Member No.: 497 ![]() |
Note that the Hellas Basin (lower left of the lower right) shows up darker, which is "cooler", but i would have expected that low elevation area to be warmer. But i wonder if the thicker column of atmosphere (CO2) would have an effect? Better unpaywalled link is https://www.esa.int/Science_Exploration/Spa...s_of_Red_Planet 4.3 microns is not quite thermal IR, and there is an CO2 absorption there, so I would guess the 4.3 micron signal is correlated to elevation at least in part. Seems odd that they didn't show the same FOV between the two wavelengths. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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