ROSAT image of the galaxy cluster Abell 3528, observed in May 1995
ROSAT image of the galaxy cluster Abell 3528, observed in May 1995
In May 1995, ROSAT obtained this image of a galaxy cluster with a diameter of 10 million light years. This is just one of more than 200,000 ROSAT sources. The colours indicate the temperatures of the hot gas in the galactic nebula, as derived from ROSAT imaging data. In the regions at the centre of this image, the temperatures may rise to more than ten million degrees Celsius. Superimposed is an optical image (black) showing the superimposed individual galaxies.
