Recently the Galaxy Zoo project was expanded by the addition of over 70,000 new galaxies. Before now Galaxy Zoo only featured optical images, but these new pictures were taken in the infrared part of the electromagnetic spectrum and are from the UKIRT Infrared Deep Sky Survey (or UKIDSS). The image above shows a comparison of the same galaxy captured in optical by SDSS (on the left) and in infrared by UKIDSS (on the right). In the optical image the central bulge looks ‘boxy’, however when viewed in infrared a more intriguing X-shape is revealed!
So citizen scientists at Galaxy Zoo will now be providing classifications for the same galaxies in both optical and infrared wavelengths, in a uniform way. This is incredibly valuable. You can read more about the science on the Galaxy Zoo blog here.