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HST images of Uranus and Neptune
titanicrivers
post Feb 14 2019, 09:16 PM
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Amazing new images from Hubble Space Telescope (HST) of Uranus and Neptune! https://earthsky.org/space/hubble-space-tel...-uranus-neptune
Here are the Hubble site images: http://hubblesite.org/images/news/release/2019-06
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titanicrivers
post Feb 20 2019, 09:01 PM
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Appreciate your expert commentary JRehling! While visible spectrum images of Uranus may remain bland we are fortunate to have the capabilities of Hubble and large ground based telescopes (Keck, Gemini at present) to image Uranus in the near IR and methane/hydrogen filter views. It is humbling (for myself at least) to review the literature of the last 20 years and discover papers, such as https://www.sciencedirect.com/science/artic...0320?via%3Dihub of Sromovsky et al providing images spanning almost a quarter of Uranus’s 84 year sol revolution (see first figure below) revealing changes in the atmosphere we might not otherwise be aware of. (as in Fig. 3 below from that paper).
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Attached Image

Fig. 3. H-band (1.6-μm) images of Uranus from 1997 through 2015, from observatories/instruments given in the legends. The bright south polar region seen in 1997
(A), 10 years before equinox, is similar to the bright north polar region seen in 2015 (F), eight years after equinox. Images taken during the 2007 equinox year
found that neither polar region was bright. The longitude and planetographic latitude grid lines are at 30 and 15 intervals respectively.
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