Little Day-Glo Orange Spot

The above Hubble image, released back in April, is in the news again because the origin of the so-called “Little Red Spot” seems to be “the only survivor among three white-colored storms that merged together” in the last decade, resulting in a ruddy storm with wind speeds that rival its Great Red Sibling.

But I find this image slightly disturbing. The almost radioactive, day-glo red of the two spots (and excessive blue of the normally white bands) deserves greater attention than it receives in the picture’s caption. All we learn is that “two filters are shown in red/orange (F892N, near-IR strong methane band) and blue/cyan (F502N continuum/cyan light),” which I find less than satisfying. Is that “red/orange” and “blue/cyan” on top of a “true-color” image? I take it to be the case, but the verbiage leaves me guessing. (Certainly when you compare the above to another Hubble image of the same part of Jupiter, taken around the same time, the colors are quite different.)

This is a good place to spend a little time, in my opinion, explaining a bit of process. Mention something about “particular wavelengths of light” or “enhanced color” or something. Make it clear that we’re not seeing Jupiter as it would appear were one to put one’s eye up to Hubble’s eyepiece.

(Um, just in case… That last line was a joke. Hubble has no eyepiece. It’s in space. For more info on how Hubble images are made, please read the lovely “Behind the Pictures” page at the Hubble website.)

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