The newest instrument on board the Hubble Space Telescope – the Wide Field Camera 3 – was used to take this image of flocculent spiral galaxy NCG 2841, at ultraviolet and infrared wavelengths.
This galaxy is a HST target because it is forming few new stars. It is a dusty spiral galaxy with short arms, and a relatively low current star-formation rate, in contrast to starburst galaxies such as M82. There are lots of hot young stars in the galaxy disc, picked out in bright blue in this image, but few sites where gas collapse is taking place to form new ones. It may be that the energetic young stars are themselves destroying the star-forming regions in which they formed.
The WFC-UVIS is optimized to record ultraviolet radiation from young stars – picked out in bright blue in this false-colour image. This image also uses orange for Ha and [N II] and red to show infrared radiation. This image is roughly 10 kiloparsecs across (2.6 arcminutes), and the galaxy lies 46 million light-years (14 million parsecs) away, in the constellation Ursa Major.