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A multi-wavelength comparison of Jupiter's Little Red Spot (top) and Great Red Spot (bottom). Images are not to scale, and all wavelengths are listed in microns. The 0.26, 0.41 and 0.89 µm images are from Hubble Space Telescope, acquired on Feb. 26, 2007. The 8.59 and 10.77 µm images were acquired on Feb. 28, 2007 (LRS) and March 1 (GRS) at the VLT. The 0.26 µm filter is sensitive to stratosphere haze, 0.41 µm to troposphere clouds and haze color, 0.89 µm to upper troposphere cloud and haze opacity, 8.59 µm to troposphere cloud opacity and temperature, and 10.77 µm to troposphere temperature and ammonia gas. The black arrow marks a small oval southeast of the LRS. The southern portion of the GRS is brighter at 8.59 and 10.77 µm.

This image appears in the June 2008 issue of the Astronomical Journal.

Credit: NASA/ESO/HST/The Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute

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