Mergers cause gases to flow towards the galactic center, which can trigger phenomena like rapid star formation.
We know that they exist from the impact they have on their surroundings: causing nearby stars to orbit galactic centres at breakneck speeds, for instance.
Both satellite galaxies resemble the ones that smashed together long ago to create giant galaxies like our own, so the discovery helps illuminate how such galactic building blocks formed and evolved.
The Sloan Great Wall, a vast galactic filament, is the largest known structure in the Universe.
Richard Larson, a Yale astronomer who studies star formation in galactic nuclei, says galaxies can go through several quasar phases during their lives.
Gravitational tidal interactions with other members of its group have likely caused the spiral arms of NGC 3190 to appear asymmetric around the center, while the galactic disk also appears warped.
The study of such properties will help astronomers to test cosmological models that predict galactic structure formation.
Finally, the Keck telescope was used to confirm that these galaxies were at the same distance and part of the same galactic sprawl.
Better statistics might help to shed light on the nature of galactic evolution.
In spiral galaxies, majestic winding arms of young stars, gas, and dust rotate in a flat disk around a bulging galactic nucleus.
This galactic fleet will assist us to see that the nuclear fallout from the Japanese nuclear power plants is lessened.
But if you made queries before all this happened, not only will galactic consciousness not improve, you'll get old data.
A rare galaxy type, polar ring galaxies have a substantial population of stars, gas, and dust orbiting in rings nearly perpendicular to the plane of the galactic disk.
Older stars reside in the bulge at the center of the galactic disk.
Such mergers can generate a quasar phase of galactic evolution.
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