This previously unreleased colour image of the planetary nebula NGC 5979 was combined from raw FITS files with the ESA/ESO/NASA Photoshop FITS Liberator. In the top row the raw greyscale images are seen. Four individual exposures were combined to form this colour image and the colour filters for the individual exposures are indicated. The number refers to the colour;; or wavelength;; of light that the filter allows through. This is measured in nanometres (a millionth of a millimetre). The N’s and W’s in the filter name refer to whether the filter is a narrow-band (N) or a wide-band filter (W). The second row shows the individual exposures after a colorising layer has been applied in Photoshop. Image credit: ESA;; ESO and NASA
For many years astronomical images from the world’s telescopes were reserved for an elite of astronomers and technical people. Now anyone with a desktop computer running Adobe® Photoshop® software can try their hand at crafting astronomical images as beautiful as those from the Hubble Space Telescope. A free software plug-in, released today, makes a treasure trove of archival astronomical images and spectra from the NASA/ESA Hubble Space Telescope, the European Southern Observatory’s Very Large Telescope, the European Space Agency’s XMM-Newton X-ray observatory, NASA’s Spitzer Space Telescope and many other famous telescopes accessible to home astronomy enthusiasts.
If there is anything that unites astronomy, it is the worldwide use of a single file format - nearly all the images of stars and galaxies produced by telescopes on the ground and in space are stored as so-called FITS files. Unfortunately this file format has been accessible to very few people other than professional scientists using highly specialised image-processing tools.
Now a new and unique tool - the ESA/ESO/NASA Photoshop FITS Liberator – developed by imaging scientists at the European Space Agency, the European Southern Observatory and NASA makes the immense wealth of astronomical images and spectra stored in data archives around the world accessible to the layman. The only thing required is access to either Adobe Photoshop® or Adobe Photoshop Elements®, both leading image software packages.
Lars Christensen | alfa
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