Two colliding galaxies have been found to be reorganizing their dwarf satellites, potentially solving a major conundrum plaguing the standard model of cosmology.

If you want to pinpoint your place in the universe, start with your cosmic address. You live on Earth->Solar System->Milky Way Galaxy->Local Cluster->Virgo Cluster->Virgo Supercluster->Laniakea.

Our Local Group of galaxies contains at least 80 members, the vast majority of which are dwarfs. These small galaxies are somewhat hard to detect in or near the plane of the Milky Way (thus, the ...