A high rate of star formation within the galaxies suggests the two are merging, researchers said.
The Very Large Telescope in Chile has taken the deepest spectroscopic survey of space ever, with astronomers focusing on the Hubble Ultra Deep Field.
Researchers have pinpointed a "smoking gun" behind the phenomenon of the sun's atmosphere being thousands of degrees hotter than the solar surface.
Researchers are trying to understand the extreme physics of black holes, and are zeroing in on how they project bright columns of hot gas and radiation.
The mystery of why the universe exists has deepened as an ultra-precise comparison of the magnetism of matter and antimatter shows no difference.
Physicists have a new scenario of the universe's expansion at the Big Bang that may explain why our universe has three large spatial dimensions.
Neutron stars colliding 130 million years ago produced gravitational waves and visible light that were recently detected by observatories around the world.
Previously undetected matter was found in the form of gas filaments between galaxies, which is a major step toward explaining the structure of the cosmos.
Data from the Red Planet shows that conditions in the Eridania basin of Mars once resembled those on Earth when life first emerged billions of years ago.
An embarrassment for the US at the outset of the space race eventually gave way to a period of scientific diplomacy with Soviet researchers.