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Thomas Barlow
IPAC staff

A multitude of ultraviolet spectra acquired by the Galaxy Evolution Explorer (GALEX) orbiting space telescope. Each of these spectral pinwheels represent a single star, galaxy, or quasar. Combining over 9 hours of exposure, the multiple spokes are caused by rotating the angle of the light dispersing prism. By selecting many angles over 360 degrees, astronomers are able to disentangle the overlapping spectra of adjacent astronomical objects. For the past 6 years, GALEX has been in orbit studying how galaxies, as fundamental structures in our Universe, evolve and change.

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