Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA).
The Wide Field and Planetary Camera 2 (WFPC2) on the Hubble telescope has captured the rare event of four of Saturn's moons lining up in front of the planet.
The snapshot which was taken on 24th February was taken on the WFPC2, the camera behind most of the famous Hubble pictures. This is the telescope's main camera and observes almost everything, recording razor-sharp images of faraway objects.
The camera features 48 filters which gives scientists the chance to study a range of wavelengths from ultraviolet to near-infrared. For this particular image the camera used three filters the F675W (R) (red), F555W (V) (green) and F439W (B) (blue) and the image is made up of separate exposures all taken on the WFPC2.
The WFPC2 has four postage stamp-sized CCDs which records objects that are 1,000 million times fainter than the naked eye can see and each one contains 640,000 pixels. The WFPC2 is made up of four cameras in total: one planetary camera and three which look at a wider field. The planetary camera concentrates on one small section of the sky – compacting the same number of pixels as the wide-field cameras into a smaller area which means it produces images with greater detail.