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Carina Nebula (NGC 3372) and the star Eta Carinae (upper centre), composite image. Eta Carinae is a variable hypergiant star. This region is 10,000 light years from Earth, in the constellation of Carina. This composite image combines data in infrared (red and green) and optical (blue). The infrared data is from the IRAC instrument on the Spitzer Space Telescope and 2MASS (Two Micron All Sky Survey). The optical data is from the DSS (Digitized Sky Survey). This allows study of the structure of the nebula. Red areas are hidden behind dark clouds of dust in visible light. Blue areas are not obscured by dust. Image published in 2011.

Spiral galaxy NGC 3521. This image was obtained in visible and near-infrared light. NGC 3521, which is 50,000 light years across, is 35 million light years from Earth in the constellation of Leo. The data for this image was obtained using the FORS1 (focal reducer and low dispersion spectrograph) instrument on ESO's Very Large Telescope (VLT). The VLT is an array of telescopes where the data is combined using interferometry to produce high-resolution images. The VLT is located at the Paranal Observatory in Chile. Here, visible light is blue and green, and infrared light is red. Image published in August 2011.

Spiral galaxy M81, composite image. M81 is around 12 million light years from Earth, in the constellation of Ursa Major. It has a supermassive black hole at its centre. This image was obtained by the Chandra X-ray Observatory (blue), Hubble Space Telescope (visible light, green), the Spitzer Space Telescope (infrared, pink), and the Galaxy Evolution Explorer Orbiter(GALEX, ultraviolet, purple).

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