In the image, intergalactic gas is shown in pink and the mass centroids of the colliding clusters in blue, showing the separation of the two, similar to the Bullet Cluster.

The visible light images from Hubble showed gravitational lensing which allowed astronomers to infer the distribution of total mass (both dark matter and normal matter)(colored in blue).

The distribution of normal matter is mostly in the form of hot gas glowing brightly in X-rays (shown pink).

The international team of astronomers in this study was led by Marusa Bradac of the University of California, Santa Barbara, and Steve Allen of the Kavli Institute for Particle Astrophysics and Cosmology at Stanford University and the Stanford Linear Accelerator Center (SLAC).

[4] The two clusters that formed MACS J0025 are each almost a quadrillion times the mass of the Sun.