Multicoloured filaments in space surrounding a bright blue core, Sagittarius A*. The filaments appear to be red, and green, and look gaseous.
This X-ray image of the galactic centre merges all Swift observations from 2006 through 2013. Sagittarius A* is at the centre. Low-energy (300 to 1,500 electron volts) X-rays appear red. Green are medium-energy (1,500 to 3,000 eV). Blue are high-energy (3,000 to 10,000 eV).
NASA/Swift/N. Degenaar