Several dwarf galaxies that `dance` throughout the universe in arranged disc-shaped orbits around larger ones makes it more difficult to understand how the universe was formed and evolved, according to a new study.
Earlier in March, astronomers announced that they had discovered the gravitational ripples in space-time that are echoes of the massive expansion of the universe that took place just after the Big Bang.
Astronomers have identified the point where the Universe moved from heating to cooling - 11 billion years ago, when the temperature was an astonishing 13,000 degrees Celsius, hotter than the surface of the Sun.
Know how galaxies across the universe are connected? Opening a new chapter in unlocking this mystery, for the first time, astronomers have taken unprecedented images of the intergalactic medium (IGM) - the diffuse gas that connects galaxies.