The weather has been too bad, and I have been too busy with this Thunderclap to to find a flower photo for today. I think this is just as good, though. It’s a composite image of Pandora’s Cluster constructed with data from the Chandra X-Ray Observatory and several different telescopes.
Pandora’s Cluster is officially designated Abell 2744. It’s 3.5 billion light years from Earth, and 400 trillion times the mass of the sun. It is formed by a group of four galaxy clusters that have been colliding for 350 million years. The red in the image is hot gas. The blue shows concentrations of the dark matter which makes up 75% of this massive structure.
The photo link goes to the BBC story where I originally discovered the image.