The space between galaxies is filled with a tenuous gas (the intergalactic medium) having an average density of less than one atom per cubic meter. The majority of galaxies are gravitationally organized into groups, clusters, and superclusters.
Politics
Global
Sports
Cuisine
Advertisement space
Click edit button to change this text. Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Subscribe to the online magazine and enjoy exclusive benefits and premiums.