Space science
Cosmic bridge between galaxies
The Abell 2384 system carries an obsession with dreary pasts. Several hundred million years ago, the two galaxies that formed this system collided with each other.
Metrewave
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The two groups of galaxies are 100 trillion times the mass of the Sun
The scientists observed two groups of galaxies rushing at each other at 4.6 million kilometers per hour, preparing to form a large cluster.